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Articoli di riviste sul tema "Cyclohexane"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 25 luglio 2025

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1

Guo, Jia Neng, Jin Zhi Lin, Xin Liu, et al. "The Progress of Catalyst for Cyclohexane Dehydrogenation Processes." Advanced Materials Research 953-954 (June 2014): 1261–68. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.1261.

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Abstract (sommario):
Cyclohexane dehydrogenation is an important process in the petrochemical industry, chemical raw material such as cyclohexanol, cyclohexanone,benzene and cyclohexene can be produced from which.Divided cyclohexane dehydrogenation into catalytic dehydrogenation or oxidative dehydrogenation, homogeneous or heterogeneous reaction. Summarized vary catalysts, active constituent and process conditions in dehydrogenation process.
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2

Kurganova, E. A., A. S. Frolov, S. A. Kanaev, et al. "Epoxidation of cyclohexene with cyclohexyl hydroperoxide." Fine Chemical Technologies 18, no. 6 (2024): 505–16. http://dx.doi.org/10.32362/2410-6593-2023-18-6-505-516.

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Abstract (sommario):
Objectives. To investigate the regularities of the process of joint production of epoxycyclohexane, cyclohexanol, and cyclohexanone using the cyclohexene epoxidation reaction with cyclohexyl hydroperoxide in the presence of an ammonium paramolybdate catalyst, representing an alternative to the method of cyclohexanol and cyclohexanone synthesis by alkaline catalytic decomposition of cyclohexyl hydroperoxide.Methods. The qualitative and quantitative analysis of the obtained intermediate and target compounds was determined using modern physicochemical research methods: gas–liquid chromatography u
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3

Frolov, A. S., E. A. Kurganova, E. M. Yarkina, N. V. Lebedeva, G. N. Koshel, and A. S. Kalenova. "INTENSIFICATION OF THE CYCLOHEXANE LIQUID PHASE OXIDATION PROCESS." Fine Chemical Technologies 13, no. 4 (2018): 50–57. http://dx.doi.org/10.32362/2410-6593-2018-13-4-50-57.

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Liquid-phase oxidation of cyclohexane to cyclohexanol and cyclohexanone was studied in the absence of solvents under an air pressure of 0.5-5 MPa, in the temperature range 115-150 °C, catalyzed by N-hydroxyphthalimide (N-HPI). It was established for the first time that the use of N-HPI as a catalyst in place of the conventionally used metal salts of variable valence allowed a 2-3-fold increase in the conversion of the initial hydrocarbon and selectivity from 70-75 to 90%. The combined use of N-HPI with cobalt(II) acetate results in an additional increase in the conversion of cyclohexane by 30-
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4

Wang, Lei, Ming Qiao Zhu, Jian Gang Lu, and Hong Ding Hu. "Uncatalyzed Oxidation of Cyclohexane in the Microchannels." Key Engineering Materials 562-565 (July 2013): 1542–47. http://dx.doi.org/10.4028/www.scientific.net/kem.562-565.1542.

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Abstract (sommario):
The oxidation of cyclohexane in the microchannels not only improves the safety of the reaction, but also the performance of the oxidation reaction. Different gas-liquid micro mixers were used for the mixing of gas and liquid before entering into microchannels, and SIMM-V2 performed best of all. Excellent slug/plug flow can be formed in the microchannels after mixing in the gas-liquid micro mixer when the molar ratio of oxygen to cyclohexane is less than 0.5:1. The conversion of cyclohexane increased as the residence time increased, but the selectivity of cyclohexanol and cyclohexanone increase
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5

Alshehri, Salimah, and Mohamed Abboud. "Synthesis and characterization of mesoporous silica supported metallosalphen-azobenzene complexes: efficient photochromic heterogeneous catalysts for the oxidation of cyclohexane to produce KA oil." RSC Advances 14, no. 37 (2024): 26971–94. http://dx.doi.org/10.1039/d4ra04698f.

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Abstract (sommario):
The oxidation of cyclohexane to produce KA oil (cyclohexanone and cyclohexanol) is important industrially but faces challenges such as low cyclohexane conversion at high KA oil selectivity, and difficult catalyst recyclability.
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6

Aghamammadova, S. A. "MECHANISM OF BIOMIMETIC OXIDATION OF CYCLOHEXANE TO CYCLOHEXANONE BY HYDROGEN PEROXIDE." Azerbaijan Chemical Journal, no. 1 (April 9, 2021): 61–66. http://dx.doi.org/10.32737/0005-2531-2021-1-61-66.

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Abstract (sommario):
The process of gas-phase oxidation of cyclohexane was studied in the presence of a heterogeneous biomimetic catalyst (per-FTPhPFe(III)OH/Al2O3), at 130–2500C, in which high yields of cyclohexanone and cyclohexanol were obtained up to 25.2% with a selectivity of ~80% at a cyclohexane conversion of 34%. The mechanism of the conversion of cyclohexane to cyclohexanone has been studied in detail, and the coherently synchronized character of the reaction proceeding is shown
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7

Zhang, Jiao Jing, Hua Lin Song, Jian Wang, and Hua Song. "Experimental Study on Catalytic Oxidation of Cyclohexane Catalyzed by Phosphomolybdic Acid." Advanced Materials Research 549 (July 2012): 411–14. http://dx.doi.org/10.4028/www.scientific.net/amr.549.411.

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The catalytic oxidation of cyclohexane to cyclohexanone and cyclohexanol using hydrogen peroxide over phosphomolybdic acid were studied. Factors such as the amount of catalyst, amount of the oxidant (H2O2), reaction temperature and reaction time were investigated. The conversion of cyclohexane was 35.35%, the total selectivity to cyclohexanone and cyclohexanol was 97.68% at a reaction temperature of 70 °C, reaction time of 8 h, 10 mL of acetone, 0.01 g of phosphomolybdic acid and 0.5 mL of hydrogen peroxide.
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8

Henríquez, Adolfo, Victoria Melin, Nataly Moreno, Héctor D. Mansilla, and David Contreras. "Optimization of Cyclohexanol and Cyclohexanone Yield in the Photocatalytic Oxofunctionalization of Cyclohexane over Degussa P-25 under Visible Light." Molecules 24, no. 12 (2019): 2244. http://dx.doi.org/10.3390/molecules24122244.

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Abstract (sommario):
The sustainable transformation of basic chemicals into organic compounds of industrial interest using mild oxidation processes has proved to be challenging. The production of cyclohexanol and cyclohexanone from cyclohexane is of interest to the nylon manufacturing industry. However, the industrial oxidation of cyclohexane is inefficient. Heterogeneous photocatalysis represents an alternative way to synthesize these products, but the optimization of this process is difficult. In this work, the yields of photocatalytic cyclohexane conversion using Degussa P-25 under visible light were optimized.
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9

Alnefaie, Reem S., Mohamed Abboud, Abdullah Alhanash, and Mohamed S. Hamdy. "Efficient Oxidation of Cyclohexane over Bulk Nickel Oxide under Mild Conditions." Molecules 27, no. 10 (2022): 3145. http://dx.doi.org/10.3390/molecules27103145.

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Nickel oxide powder was prepared by simple calcination of nickel nitrate hexahydrate at 500 °C for 5 h and used as a catalyst for the oxidation of cyclohexane to produce the cyclohexanone and cyclohexanol—KA oil. Molecular oxygen (O2), hydrogen peroxide (H2O2), t-butyl hydrogen peroxide (TBHP) and meta-chloroperoxybenzoic acid (m-CPBA) were evaluated as oxidizing agents under different conditions. m-CPBA exhibited higher catalytic activity compared to other oxidants. Using 1.5 equivalent of m-CPBA as an oxygen donor agent for 24 h at 70 °C, in acetonitrile as a solvent, NiO powder showed excep
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10

Zhang, Jiao Jing, Bing Bai, and Hua Song. "Experimental Study on Cyclohexane by Catalytic Oxidation Using H2O2/Ferrous Sulfate." Advanced Materials Research 233-235 (May 2011): 1288–91. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.1288.

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Catalytic oxidation of cyclohexane to cyclohexanone and cyclohexanol using hydrogen peroxide over ferrous sulfate catalyst at atmospheric condition was studied. Effect of the solvent volume, catalyst amount, hydrogen peroxide volume, reaction temperature, reaction time on reaction was investigated. Results showed that using 10 mL of acetone, 0.02 g of a ferrous sulfate and 0.5 mL of hydrogen peroxide at thereaction temperature of 80 °C for 8 h, the conversion of cyclohexane was 35.35%, the total selectivity of cyclohexanone and cyclohexanol was 94.06%.
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11

Kirkwood, Kathleen, and S. David Jackson. "Hydrogenation and Hydrodeoxygenation of Oxygen-Substituted Aromatics over Rh/silica: Catechol, Resorcinol and Hydroquinone." Catalysts 10, no. 5 (2020): 584. http://dx.doi.org/10.3390/catal10050584.

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The hydrogenation and hydrodeoxygenation (HDO) of dihydroxybenzene isomers, catechol (1,2-dihydroxybenzene), resorcinol (1,3-dihydroxybenzene) and hydroquinone (1,4-dihydroxybenzene) was studied in the liquid phase over a Rh/silica catalyst at 303–343 K and 3 barg hydrogen pressure. The following order of reactivity, resorcinol > catechol > hydroquinone (meta > ortho > para) was obtained. Kinetic analysis revealed that catechol had a negative order of reaction whereas both hydroquinone and resorcinol gave positive half-order suggesting that catechol is more strongly adsorbed. Activ
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12

Berezuk, Márcio E., Rafael B. Samulewski, Nakédia M. F. Carvalho, Andrea Paesano Jr., Pedro A. Arroyo, and Lúcio Cardozo-Filho. "Mononuclear iron(III) piperazine-derived complexes and application in the oxidation of cyclohexane." Kataliz v promyshlennosti 21, no. 3 (2021): 183. http://dx.doi.org/10.18412/1816-0387-2021-3-183.

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Oxygenated products from selective hydrocarbon oxidation have high commercial value as industrial feedstocks. One of the most important industrial processes is the cyclohexane oxidation to produce cyclohexanol and cyclohexanone. These organic substances have special importance in the Nylon manufacture as well as building blocks for a variety of commercially useful products. In this work we present the synthesis and characterization of a new mononuclear piperazine-derived series of iron(III) complexes and their catalytic activity towards cyclohexane oxidation essays. All complexes present octah
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13

Sheng, Xiaoxiao, Qinbo Wang, Zhenhua Xiong, and Chuxiong Chen. "Solubilities of adipic acid in binary cyclohexanone + cyclohexanol, cyclohexane + cyclohexanol, and cyclohexane + cyclohexanone solvent mixtures." Fluid Phase Equilibria 415 (May 2016): 8–17. http://dx.doi.org/10.1016/j.fluid.2016.01.006.

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14

Rekkab-Hammoumraoui, Ilhem, and Abderrahim Choukchou-Braham. "Catalytic Properties of Alumina-Supported Ruthenium, Platinum, and Cobalt Nanoparticles towards the Oxidation of Cyclohexane to Cyclohexanol and Cyclohexanone." Bulletin of Chemical Reaction Engineering & Catalysis 13, no. 1 (2018): 24. http://dx.doi.org/10.9767/bcrec.13.1.1226.24-35.

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Abstract (sommario):
A series of metal-loaded (Ru, Pt, Co) alumina catalysts were evaluated for the catalytic oxidation of cyclohexane using tertbutylhydroperoxide (TBHP) as oxidant and acetonitrile or acetic acid as solvent. These materials were prepared by the impregnation method and then characterized by Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES), H2 chemisorption, Fourier Transformed Infrared Spectroscopy (FTIR), High-Resolution Transmission Electron Microscopy (HRTEM), and X-ray Diffraction (XRD). All the prepared materials acted as efficient catalysts. Among them, Ru/Al2O3 was found t
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15

Lingga, Fitra Wahyuni, Jefri Jefri, Risfidian Mohadi та Aldes Lesbani. "Synthesis, Characterization, and Catalytic Performance of H₃[α-PMo₁₂O₄₀]·nH₂O-TiO₂ in Cyclohexane Oxidation". Indonesian Journal of Material Research 3, № 1 (2025): 24–30. https://doi.org/10.26554/ijmr.20253153.

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This study aims to synthesize and characterize the H₃[α-PMo₁₂O₄₀].nH₂O-TiO₂ composite as a heterogeneous catalyst for cyclohexane oxidation using H₂O₂. FT-IR and XRD characterization showed the interaction between POM and TiO₂, with an increase in TiO₂ ratio leading to a decrease in POM crystallinity. Reaction optimization showed that the POM-1.00TiO₂ catalyst gave the highest conversion of 99.95% at 80°C, 2 hours reaction time, 3 mL H₂O₂ volume, and 0.1 g catalyst mass. GC analysis confirmed the formation of cyclohexanol and cyclohexanone, with the optimized conditions resulting in a balanced
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16

Zhao, Jing, Ming Qiao Zhu, Jia Jing Chen, et al. "Cyclohexane Oxidation Catalyzed by Au/MxOyAl2O3 Using Molecular Oxygen." Advanced Materials Research 233-235 (May 2011): 254–59. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.254.

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Alumina was modified by doping with metal oxide and then used as the support for depositing gold by an impregnation-ammonia washing method to obtain Au/MxOy/Al2O3(M=Co, Zr and Ce) catalysts. These samples were characterized by inductively coupled plasma-atomic emission spectrometry (ICP-AES), transmission electron microscope (TEM) and X-ray diffraction (XRD). The effects of Co3O4content, metal oxide and mixed metal oxides on the catalytic activity for the selective oxidation of cyclohexane to cyclohexanone and cyclohexanol using molecular oxygen as oxidant were studied. The results showed that
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17

Lesbani, Aldes, Fatmawati Fatmawati, Risfidian Mohadi, Najma Annuria Fithri, and Dedi Rohendi. "Oxidation of Cyclohexane to Cylohexanol and Cyclohexanone Over H4[a-SiW12O40]/TiO2 Catalyst." Indonesian Journal of Chemistry 16, no. 2 (2018): 175. http://dx.doi.org/10.22146/ijc.21161.

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Oxidation of cyclohexane to cyclohexanol and cyclohexanone was carried out using H4[a-SiW12O40]/TiO2 as catalyst. In the first experiment, catalyst H4[a-SiW12O40]/TiO2 was synthesized and characterized using FTIR spectroscopy and X-Ray analysis. In the second experiment, catalyst H4[a-SiW12O40]/TiO2 was applied for conversion of cyclohexane. The conversion of cyclohexane was monitored using GC and GCMS. The results showed that H4[a-SiW12O40]/TiO2 was successfully synthesized using 1 g of H4[a-SiW12O40] and 0.5 g of TiO2. The FTIR spectrum showed vibration of H4[a-SiW12O40] appeared at 771-979
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18

Yang, Dexin, Tianbin Wu, Chunjun Chen, Weiwei Guo, Huizhen Liu, and Buxing Han. "The highly selective aerobic oxidation of cyclohexane to cyclohexanone and cyclohexanol over V2O5@TiO2 under simulated solar light irradiation." Green Chemistry 19, no. 1 (2017): 311–18. http://dx.doi.org/10.1039/c6gc02748b.

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19

Hwang, Kuo Chu, and Arunachalam Sagadevan. "One-pot room-temperature conversion of cyclohexane to adipic acid by ozone and UV light." Science 346, no. 6216 (2014): 1495–98. http://dx.doi.org/10.1126/science.1259684.

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Abstract (sommario):
Nitric acid oxidation of cyclohexane accounts for ~95% of the worldwide adipic acid production and is also responsible for ~5 to 8% of the annual worldwide anthropogenic emission of the ozone-depleting greenhouse gas nitrous oxide (N2O). Here we report a N2O-free process for adipic acid synthesis. Treatment of neat cyclohexane, cyclohexanol, or cyclohexanone with ozone at room temperature and 1 atmosphere of pressure affords adipic acid as a solid precipitate. Addition of acidic water or exposure to ultraviolet (UV) light irradiation (or a combination of both) dramatically enhances the oxidati
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20

Li, Hui, Yuanbin She, Haiyan Fu, Meijuan Cao, Jing Wang, and Tao Wang. "Synergistic effect of co-reactant promotes one-step oxidation of cyclohexane into adipic acid catalyzed by manganese porphyrins." Canadian Journal of Chemistry 93, no. 7 (2015): 696–701. http://dx.doi.org/10.1139/cjc-2014-0515.

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The synergistic effect of cyclohexane and cyclohexanone promoted synthesis of adipic acid catalyzed by [MnIIIT(p-Cl)PP]Cl with cyclohexane and cyclohexanone as co-reactants. The results showed that the conversions of cyclohexane and cyclohexanone were significantly enhanced because of the cyclohexanone synergistic effect, and the higher selectivity to adipic acid was obtained with dioxygen as an oxidant. The studies indicated that the co-oxidation of cyclohexane and cyclohexanone was influenced by the initial molar ratio of cyclohexanone and cyclohexane, catalyst structure, catalyst concentrat
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21

Song, Hua, Hua Lin Song, and Zai Shun Jin. "Preparation and Catalytic Performance of Co-Mo/V2O5 Composite Catalyst for Selective Oxidation of Cyclohexane." Advanced Materials Research 485 (February 2012): 76–79. http://dx.doi.org/10.4028/www.scientific.net/amr.485.76.

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A new type composite catalyst Co-Mo/V2O5 was prepared by immersion method and characterized by XRD, BET and FT-IR. The effects of Mo mass fraction, immersion time and calcination temperature on catalyst activity for oxidation of cyclohexane were investigated. Co-Mo/V2O5 subjected to immersion with 20% ammonium molybdate solution at room temperature for 1 h and calcination at 600°C exhibited the best performance. Using 0.5 ml of cyclohexane, 3 ml of hydrogen peroxide and 30 mg of catalyst at a reaction temperature of 65°C for 3 h, the cyclohexane conversion was 32.3% and the total selectivity t
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22

Lesbani, Aldes, Menik Setyowati, Risfidian Mohadi та Dedi Rohendi. "Oxidation Of Cyclohexane To Cyclohexanol And Cyclohexanone Using H4[α-SiW12O40]/Zr As Catalyst". Molekul 11, № 1 (2016): 53. http://dx.doi.org/10.20884/1.jm.2016.11.1.194.

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Synthesis and preparation of polyoxometalate H4[α-SiW12O40].nH2O with Zr as support at various weights of Zr 0.01g; 0.05 g; 0.25 g; 0.5 g; 0.75 g; 1 g and 1.25 g to form H4[α- SiW12O40]/Zr was conducted. The compounds from preparation were characterized using FTIR spectroscopy and crystallinity analysis using X-Ray diffraction. Thus H4[α- SiW12O40]/Zr was applied as catalyst for oxidation of cyclohexane to cyclohexanol and cyclohexanone. Oxidation process was studied through reaction time, hydrogen peroxide amount, temperature, and weight of catalyst. FTIR spectrum of H4[α-SiW12O40]/Zr was app
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23

Song, Hua, Zai Shun Jin, Qiang Lv, and Ming Guan. "Novel and Efficient Co-Mo/V2O5 Composite Catalysts for the Selective Oxidation of Cyclohexane." Advanced Materials Research 233-235 (May 2011): 949–52. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.949.

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A new type composite catalyst of V2O5 comprising Co-Mo/V2O5 was prepared by immersion method and characterized by XRD. The characteristic peaks of CoMoO4(2θ=28.51°) and CoMoO3(2θ=18.06 °)are both observed in the XRD patterns of Co-Mo/V2O5(5%, 20%) catalysts. The oxidation of cyclohexane with hydrogen peroxide was used as a probe reaction to investigate the effects of some conditions, such the sort and volume of solvent, catalyst amount, oxidant amount, reaction temperature and time, on reaction. Using 0.5 ml of cyclohexane, 10 ml of acetonitrile, 3 ml of hydrogen peroxide and 0.03 g of catalys
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24

Pokutsa, Alexander, Pawel Bloniarz, Orest Fliunt, Yuliya Kubaj, Andriy Zaborovskyi, and Tomasz Paczeŝniak. "Sustainable oxidation of cyclohexane catalyzed by a VO(acac)2-oxalic acid tandem: the electrochemical motive of the process efficiency." RSC Advances 10, no. 18 (2020): 10959–71. http://dx.doi.org/10.1039/d0ra00495b.

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Cyclohexane oxidation by H<sub>2</sub>O<sub>2</sub> to cyclohexanol, cyclohexanone, and cyclohexylhydroperoxide under mild (40 °C, 1 atm) conditions is significantly enhanced in the system composed of VO(acac)<sub>2</sub> (starting catalyst) and small additives of oxalic acid (process promoter).
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25

Ichihashi, Yuichi, Shingo Saijo, Masaaki Taniguchi, Keita Taniya, and Satoru Nishiyama. "Study of Cyclohexane Photooxidation over Pt-WO3 Catalysts Mixed with TiO2 under Visible Light Irradiation." Materials Science Forum 658 (July 2010): 149–52. http://dx.doi.org/10.4028/www.scientific.net/msf.658.149.

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The photooxidation of cyclohexane to cyclohexanone, cyclohexanol and CO2 was carried out by visible light irradiation to tungsten oxide photocatalysts. The physical mixing of tungsten oxide and titanium oxide (WO3+TiO2) led to the high photocatalytic activity. It was speculated that the physical mixing of WO3 and TiO2 took place the charge transfer between WO3 and TiO2, and this inhibited the recombination between electrons and holes on the WO3 surface. The platinum loading on WO3 further developed the photocatalytic activity of WO3+TiO2 photocatalyst. Hence, the degree of the recombination be
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26

Matias, Inês A. S., A. P. C. Ribeiro, Rui P. Oliveira-Silva, Duarte M. F. Prazeres, and Luísa M. D. R. S. Martins. "Gold Nanotriangles as Selective Catalysts for Cyclohexanol and Cyclohexanone Production." Applied Sciences 8, no. 12 (2018): 2655. http://dx.doi.org/10.3390/app8122655.

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The search for sustainable catalytic oxidation processes remains a challenge. One process of utmost industrial and economic importance is the selective oxidation of cyclohexane, in the route of nylon-6,6 production, which requires urgent improvement. Herein, Au nanotriangles (Au NTs) were prepared following a three-step (seed preparation, growth and shaping) procedure and applied, for the first time, as catalysts for the selective oxidation of neat cyclohexane to ketone and alcohol (KA) oil (cyclohexanol and cyclohexanone mixture). The Au NTs successfully yield KA oil (up to 14%) under mild co
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27

Siboonruang, Tana, and Karla Negrete. "Reaction Pathways for the Electrochemical Synthesis of KA Oil from Cyclohexane." ECS Meeting Abstracts MA2022-02, no. 64 (2022): 2387. http://dx.doi.org/10.1149/ma2022-02642387mtgabs.

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Recent decreases in the cost of electricity from both renewable and non-renewable sources and limitations of fossil fuel resources have bolstered interest in producing commodity chemicals using electrochemistry. Electrosynthesis offers promising alternatives to thermochemical processes, because they do not typically require extreme temperature and pressure. In addition, electric current can be used to replace dangerous reducing and oxidizing agents used in traditional organic chemistry. Electrosynthesis has been demonstrated as a possible pathway for partial oxidation of alkanes, which contain
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28

Siboonruang, Tana, and Maureen Tang. "Mechanistic Insights into the Electrochemical Oxidation of Cyclohexane." ECS Meeting Abstracts MA2022-02, no. 52 (2022): 1996. http://dx.doi.org/10.1149/ma2022-02521996mtgabs.

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The detrimental effects of CO2 emissions from fossil fuels and the decreasing cost of electricity have accelerated interest in electrochemical synthesis. Electro-organic synthesis offers a sustainable and cost-effective pathway for chemical manufacturing. This method has the potential to minimize greenhouse gas emissions, enhance reaction selectivity, and replace hazardous chemical reagents with electric current. Electrochemistry enables alternative mild temperature and pressure pathways to traditional thermochemical reactions. An intermediate step to producing nylon 6,6 is synthesis of KA oil
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29

Fahy, Kira, Adam Liu, Kelsie Barnard, Valerie Bright, Robert Enright, and Patrick Hoggard. "Photooxidation of Cyclohexane by Visible and Near-UV Light Catalyzed by Tetraethylammonium Tetrachloroferrate." Catalysts 8, no. 9 (2018): 403. http://dx.doi.org/10.3390/catal8090403.

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Tetraethylammonium tetrachloroferrate catalyzes the photooxidation of cyclohexane heterogeneously, exhibiting significant photocatalysis even in the visible portion of the spectrum. The photoproducts, cyclohexanol and cyclohexanone, initially develop at constant rates, implying that the ketone and the alcohol are both primary products. The yield is improved by the inclusion of 1% acetic acid in the cyclohexane. With small amounts of catalyst, the reaction rate increases with the amount of catalyst employed, but then passes through a maximum and decreases, due to increased reflection of the inc
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30

Gao, Su Ling, Tai Xuan Jia, and Zi Li Liu. "Catalyzed Oxidation of Cyclohexane over Co-Bi2(MoO4)3 Catalysts." Advanced Materials Research 550-553 (July 2012): 354–57. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.354.

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The effect of catalyst on the performance of liquid-phase selective oxidation of cyclohexane as probe reaction over Co-Bi2(MoO4)3 prepared by precipitation method was investigated. The catalyst evaluation results show that the optimum catalyst atomic ratio is n(Mo):n(Bi):n(Co)=1.5:1:0.2 with high selecivity under certain conversion. Meanwhile selective oxidation of Bi2(MoO4)3 was slowed down, selecivity of cyclohexanone and cyclohexanol reached 74.1%, 22.2% respectively.The main composition of the catalyst is Bi2(MoO4)3. Co-Bi2(MoO4)3 had new catalyst sites with Bi3+, Mo6+ and Co2+ having a co
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31

Wan, Jun, Jing Zhao, Ming Qiao Zhu, Huan Dai, and Lei Wang. "Selective Oxidation of Cyclohexane to Cyclohexanone and Cyclohexanol over Au/Co3O4 Catalyst." Advanced Materials Research 284-286 (July 2011): 806–10. http://dx.doi.org/10.4028/www.scientific.net/amr.284-286.806.

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Abstract (sommario):
Au/Co3O4catalysts were prepared by a co-precipitation method and characterized by inductively coupled plasma-atomic emission spectrometry (ICP-AES), transmission electron microscope (TEM) and X-ray diffraction (XRD). The selective oxidation of cyclohexane to cyclohexanone and cyclohexanol was investigated over Au/Co3O4catalysts using molecular oxygen as oxidant. These catalysts showed higher activities as compared to the pure Co3O4under the same reaction conditions.
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32

Peng, Ling, Chan Liu, Na Li, et al. "Direct cyclohexanone oxime synthesis via oxidation–oximization of cyclohexane with ammonium acetate." Chemical Communications 56, no. 9 (2020): 1436–39. http://dx.doi.org/10.1039/c9cc09840b.

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Abstract (sommario):
One-step preparation of cyclohexanone oxime from cyclohexane and ammonium acetate. 13.6% cyclohexane conversion and 51% cyclohexanone oxime selectivity are achieved. Varieties of different ammonias as readily available starting materials.
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33

Jin, Mei, Ping Lu, and Guo Xian Yu. "Kinetic Study of the Oxidative Dehydrogenation of Cyclohexane over Mg3(VO4)2 Catalyst." Advanced Materials Research 550-553 (July 2012): 379–82. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.379.

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Abstract (sommario):
A Mg3(VO4)2catalyst was synthesized and investigated for the oxidative dehydrogenation of cyclohexane to cyclohexene. Integral measurements were performed to determine the reaction network and products distribution, and differential measurements for kinetic investigations. The kinetic study indicated the oxidative dehydrogenation of cyclohexane to cyclohexene follow a parallel-consecutive network. The power law kinetic model was considered as a rough approximation of the experimental results. The rate constants, which included the activation energies, the pre-exponential factors as well as the
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34

Pei, Yinchuan, Qinbo Wang, Xing Gong, Fuqiong Lei, and Binwei Shen. "Distribution of cyclohexanol and cyclohexanone between water and cyclohexane." Fluid Phase Equilibria 394 (May 2015): 129–39. http://dx.doi.org/10.1016/j.fluid.2015.02.029.

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35

Kirillova, Marina V., Polyana Tomé de Paiva, Wagner A. Carvalho, Dalmo Mandelli, and Alexander M. Kirillov. "Mixed-ligand aminoalcohol-dicarboxylate copper(II) coordination polymers as catalysts for the oxidative functionalization of cyclic alkanes and alkenes." Pure and Applied Chemistry 89, no. 1 (2017): 61–73. http://dx.doi.org/10.1515/pac-2016-1012.

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Abstract (sommario):
AbstractNew copper(II) catalytic systems for the mild oxidative C–H functionalization of cycloalkanes and cycloalkenes were developed, which are based on a series of mixed-ligand aminoalcohol-dicarboxylate coordination polymers, namely [Cu2(μ-dmea)2(μ-nda)(H2O)2]n·2nH2O (1), [Cu2(μ-Hmdea)2(μ-nda)]n·2nH2O (2), and [Cu2(μ-Hbdea)2(μ-nda)]n·2nH2O (3) that bear slightly different dicopper(II) aminoalcoholate cores, as well as on a structurally distinct dicopper(II) [Cu2(H4etda)2(μ-nda)]·nda·4H2O (4) derivative [abbreviations: H2nda, 2,6-naphthalenedicarboxylic acid; Hdmea, N,N′-dimethylethanolamine
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36

Melnyk, Yu, and S. Melnyk. "Effect of crown ethers and polyglycols on the catalytic oxidation of cyclohexane and alkylarenes." Voprosy Khimii i Khimicheskoi Tekhnologii, no. 4 (September 2024): 116–23. http://dx.doi.org/10.32434/0321-4095-2024-155-4-116-123.

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Abstract (sommario):
The effect of crown ethers and polyglycols on the liquid-phase oxidation of cyclohexane and alkylaromatic hydrocarbons (toluene and p-xylene) with molecular oxygen catalyzed by transition metal salts has been investigated. It has been determined that crown ethers increase the reaction rate at both low and high conversion levels of cyclohexane and alkylaromatic hydrocarbons. The additives under study primarily affect the selectivity of the oxidation products. Crown ether and polyglycol additives to cobalt naphthenate increase the cyclohexanone to cyclohexanol molar ratio in cyclohexane oxidatio
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37

Guo, Can-Cheng, Xiao-Qin Liu, Qiang Liu, Yang Liu, Ming-Fu Chu, and Wei-Ying Lin. "First industrial-scale biomimetic oxidation of hydrocarbon with air over metalloporphyrins as cytochrome P-450 monooxygenase model and its mechanistic studies." Journal of Porphyrins and Phthalocyanines 13, no. 12 (2009): 1250–54. http://dx.doi.org/10.1142/s1088424609001613.

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Abstract (sommario):
A novel industrial-scale trial for cyclohexane oxidation with air over metalloporphyrins as cytochrome P-450 monooxygenase model was reported. Upon addition of extremely low concentrations (1–5 ppm) of simple cobalt porphyrin to the commercial cyclohexane oxidation system, and decrease of the reaction temperature and pressure about 20 °C and 0.4 MPa respectively, the conversion rate of the cyclohexane oxidation increased from 4.8% to 7.1%, the yield of cyclohexanone raised from 77% to 87%, and a 70,000-ton cyclohexanone equipment set yielded an output of 125,000 tons cyclohexanone. Furthermore
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38

Roy Barman, Tannistha, Manas Sutradhar, Elisabete C. B. A. Alegria, Maria de Fátima C. Guedes da Silva, and Armando J. L. Pombeiro. "Fe(III) Complexes in Cyclohexane Oxidation: Comparison of Catalytic Activities under Different Energy Stimuli." Catalysts 10, no. 10 (2020): 1175. http://dx.doi.org/10.3390/catal10101175.

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Abstract (sommario):
In this study, the mononuclear Fe(III) complex [Fe(HL)(NO3)(H2O)2]NO3 (1) derived from Nʹ-acetylpyrazine-2-carbohydrazide (H2L) was synthesized and characterized by several physicochemical methods, e.g., elemental analysis, infrared (IR) spectroscopy, electrospray ionization mass spectrometry (ESI-MS), and single crystal X-ray diffraction analysis. The catalytic performances of 1 and the previously reported complexes [Fe(HL)Cl2] (2) and [Fe(HL)Cl(μ-OMe)]2 (3) towards the peroxidative oxidation of cyclohexane under three different energy stimuli (microwave irradiation, ultrasound, and conventio
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39

Kim, Sin Young, Jaehoon Choe, and Kwang Ho Song. "(Liquid + Liquid) Equilibria of (Cyclohexane + Dimethyl Sulfoxide + Cyclohexanone) and (Cyclohexane + Dimethyl Sulfoxide + Cyclohexanol) atT= 303.2 K." Journal of Chemical & Engineering Data 55, no. 3 (2010): 1109–12. http://dx.doi.org/10.1021/je900549r.

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40

Yu, Ximeng, Zhongquan Shen, Qing Sun, Nianlong Qian, Chao Zhou, and Jizhong Chen. "Solubilities of Adipic Acid in Cyclohexanol + Cyclohexanone Mixtures and Cyclohexanone + Cyclohexane Mixtures." Journal of Chemical & Engineering Data 61, no. 3 (2016): 1236–45. http://dx.doi.org/10.1021/acs.jced.5b00880.

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41

Saleh, M. S. A., A. Aouissi, A. A. Al-Suhybani, and A. M. Al-Mayouf. "Fabrication of Carbon Graphite-supported Pt–SiW12O40 Catalysts Effect of the Pt Loading on the Electrooxidation of Cyclohexane." Journal of New Materials for Electrochemical Systems 17, no. 2 (2014): 049–54. http://dx.doi.org/10.14447/jnmes.v17i2.423.

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Abstract (sommario):
H4SiW12O40 (abbreviated as SiW) and Pt supported on carbon graphite (CG) with different Pt/SiW ratios were prepared and characterized by FTIR, XRD, ICP-OES, polarography, and TEM. The prepared catalysts were then after successfully attached onto glassy carbon electrodes by using polyvinylidene difluoride (PVDF) as binder. The resulting electrocatalysts were characterized by cyclic voltammetry (CV) and tested for the electrooxidation of cyclohexane. It has been found that the addition of SiW to the catalyst increased the dispersion of the Pt particles. The results of the electrocatalytic tests
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42

Hong, Yun, Yanxiong Fang, Dalei Sun, and Xiantai Zhou. "Ionic liquids modified cobalt/ZSM-5 as a highly efficient catalyst for enhancing the selectivity towards KA oil in the aerobic oxidation of cyclohexane." Open Chemistry 17, no. 1 (2019): 639–46. http://dx.doi.org/10.1515/chem-2019-0068.

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Abstract (sommario):
AbstractThe industrial oxidation of cyclohexane is currently performed with very low conversion level, i.e. 4-6% conversion and poor selectivity for cyclohexanone and cyclohexanol (K-A oil), i.e.70-85%, at above 150oC reaction temperature and above 10atm reaction pressure using molecular oxygen oxidant and homogeneous catalyst. Several disadvantages are, however, associated with the process, such as, complex catalyst-product separation, high power input, and low safe operation. Therefore, the oxidation of cyclohexane using heterogeneous catalyst oxygen oxidant from air at mild conditions has r
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43

Vaiano, Vincenzo, and Diana Sannino. "UV Light Driven Selective Oxidation of Cyclohexane in Gaseous Phase Using Mo-Functionalized Zeolites." Surfaces 2, no. 4 (2019): 546–59. http://dx.doi.org/10.3390/surfaces2040040.

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Abstract (sommario):
Heterogeneous photocatalysis in the gas phase has been applied as a promising technique for organic syntheses in mild conditions. Modified zeolites have been used under UV irradiation as novel photocatalysts. In this study, we preliminarily investigated the photoxidation of cyclohexane on ferrierite and MoOx-functionalized ferrierite in a gas–solid continuous flow reactor. In the presence of UV light, MoOx-functionalized ferrierite showed the formation of benzene and cyclohexene as reaction products, indicating the occurrence of photocatalysed cyclohexane oxydehydrogenation. By contrast, unmod
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44

Rydel-Ciszek, Katarzyna, Tomasz Pacześniak, Paweł Chmielarz, and Andrzej Sobkowiak. "Bio-Inspired Iron Pentadentate Complexes as Dioxygen Activators in the Oxidation of Cyclohexene and Limonene." Molecules 28, no. 5 (2023): 2240. http://dx.doi.org/10.3390/molecules28052240.

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Abstract (sommario):
The use of dioxygen as an oxidant in fine chemicals production is an emerging problem in chemistry for environmental and economical reasons. In acetonitrile, the [(N4Py)FeII]2+ complex, [N4Py—N,N-bis(2-pyridylmethyl)-N-(bis-2-pyridylmethyl)amine] in the presence of the substrate activates dioxygen for the oxygenation of cyclohexene and limonene. Cyclohexane is oxidized mainly to 2-cyclohexen-1-one, and 2-cyclohexen-1-ol, cyclohexene oxide is formed in much smaller amounts. Limonene gives as the main products limonene oxide, carvone, and carveol. Perillaldehyde and perillyl alcohol are also pre
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45

Steyer, Frank, and Kai Sundmacher. "VLE and LLE Data for the System Cyclohexane + Cyclohexene + Water + Cyclohexanol." Journal of Chemical & Engineering Data 49, no. 6 (2004): 1675–81. http://dx.doi.org/10.1021/je049902w.

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46

Henríquez, Adolfo, Héctor D. Mansilla, Azael Martínez-de la Cruz, Lorena Cornejo-Ponce, Eduardo Schott, and David Contreras. "Selective Oxofunctionalization of Cyclohexene over Titanium Dioxide-Based and Bismuth Oxyhalide Photocatalysts by Visible Light Irradiation." Catalysts 10, no. 12 (2020): 1448. http://dx.doi.org/10.3390/catal10121448.

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Abstract (sommario):
Photocatalysis driven under visible light allows us to carry out hydrocarbon oxofunctionalization under ambient conditions, using molecular oxygen as a sacrificial reagent, with the absence of hazardous subproducts and the potential use of the Sun as a clean and low-cost source of light. In this work, eight materials—five based on titanium dioxide and three based on bismuth oxyhalides—were used as photocatalysts in the selective oxofunctionalization of cyclohexene. The cyclohexane oxofunctionalization reactions were performed inside of a homemade photoreactor equipped with a 400 W metal halide
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47

Henríquez, Adolfo, Romina Romero, Lorena Cornejo-Ponce, et al. "Selective Oxofunctionalization of Cyclohexane and Benzyl Alcohol over BiOI/TiO2 Heterojunction." Catalysts 12, no. 3 (2022): 318. http://dx.doi.org/10.3390/catal12030318.

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Abstract (sommario):
Heterogeneous photocatalysis under visible light irradiation allows performing of selective oxofunctionalization of hydrocarbons at ambient temperature and pressure, using molecular oxygen as a sacrificial reagent and potential use of sunlight as a sustainable and low-cost energy source. In the present work, a photocatalytic material based on heterojunction of titanium dioxide and bismuth oxyiodide was used as photocatalyst on selective oxofunctionalization of cyclohexane and benzyl alcohol. The selective oxidation reactions were performed in a homemade photoreactor equipped with a metal halid
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48

Hong, Yuechao, Jie Peng, Zhichao Sun, et al. "Transition Metal Oxodiperoxo Complex Modified Metal-Organic Frameworks as Catalysts for the Selective Oxidation of Cyclohexane." Materials 13, no. 4 (2020): 829. http://dx.doi.org/10.3390/ma13040829.

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Abstract (sommario):
In this work, a series of modified metal-organic frameworks (MOFs) have been prepared by pre- and post-treatment with transition metal oxodiperoxo complexes (MoO(O2)2, WO(O2)2, and KVO(O2)2). The obtained materials are characterized by XRD, FTIR, SEM, TEM, inductively coupled plasma atomic emission spectrometry (ICP-AES), and X-ray photoelectron spectroscopy (XPS), as well as by N2 adsorption/desorption measurement. The characterization results show that transition metal oxodiperoxo complexes are uniformly incorporated into the MOF materials without changing the basic structures. The performan
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49

Dietz, Wibke, Yvonne Schwerdtfeger, Uwe Klingebiel та Mathias Noltemeyer. "Bis(1-cyclohexen-3-on-1-oxy)silane, Silyl-enole von β-Ketonen/ Bis (1-cyclohexene-3-on-1-oxy)silanes, Silyl-enoles of β -Ketones". Zeitschrift für Naturforschung B 62, № 11 (2007): 1371–76. http://dx.doi.org/10.1515/znb-2007-1104.

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Abstract (sommario):
5,5-Dimethylcyclohexane-1,3-dione (dimedone) and cyclohexane-1,3-dione react with Cl2Si(CMe3)2 in the presence of triethylamine to give the bis(1-cyclohexene-3-on-1-oxy)dit butylsilanes 2 and 3. Using dimedone and Cl2SiMe2, the analogous dimethylsilane 1 is obtained. A 1,4-Michael-Addition occurs using cyclohexane-1,3-dione in the reaction with Cl2SiMe2 to give a spirocyclic diketone (4). The reaction of cyclohexane-1,3-dione with lithium-diisopropylamide and F3SiCMe3 leads to the formation of a salt [iPr2NH2]2HF[C6H7O2]2, 5. The crystal structures of 2 - 5 were determined.
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50

Sekar, P. Raja, R. Venkateswarlu, and Kalluru S. Reddy. "Excess volumes, isentropic compressibilities, and viscosities of binary mixtures containing cyclohexene." Canadian Journal of Chemistry 68, no. 2 (1990): 363–68. http://dx.doi.org/10.1139/v90-054.

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Abstract (sommario):
Excess volumes, excess isentropic compressibilities, and excess viscosities have been reported for the binary liquid mixtures of cyclohexene with n-hexane, cyclohexane, benzene, trichloromethane, tetrachloromethane, and 1,4-dioxane at 303.15 K. VE results are negative for mixtures of cyclohexene with n-hexane and tetrachloromethane and are positive for the remaining systems. [Formula: see text] values are negative for mixtures of cyclohexene with n-hexane and positive for all other systems. The data of Δ ln η are positive for cyclohexene with cyclohexane and tetrachloromethane, and negative fo
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