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Journal articles on the topic 'Bicyclo [2.1.0] pentane'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 May 2024

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1

Thirumoorthi, Navanita T., and Vikrant A. Adsool. "A practical metal-free homolytic aromatic alkylation protocol for the synthesis of 3-(pyrazin-2-yl)bicyclo[1.1.1]pentane-1-carboxylic acid." Organic & Biomolecular Chemistry 14, no. 40 (2016): 9485–89. http://dx.doi.org/10.1039/c6ob01799a.

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As a part of our ongoing synthetic quest to expand the frontiers of contemporary medicinal chemistry, we now report an expedient synthesis of a potentially useful bicyclo[1.1.1]pentane building block, 3-(pyrazin-2-yl)bicyclo[1.1.1]pentane-1-carboxylic acid. This report also showcases the application of this motif as a “spacer” probe in a biological study.

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2

Brown, SJ, SKC Kok, PA Lay, and AF Masters. "Electrochemical Behavior of Bis[pentane-2,4-dithionato(1-)]iron(II), Fe(sacsac)2, and Dicarbonylbis[pentane-2,4-dithionato(1-)]iron(II), Fe(sacsac)2(CO)2." Australian Journal of Chemistry 42, no. 11 (1989): 1839. http://dx.doi.org/10.1071/ch9891839.

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The redox behaviours of Fe(sacsac)2 and Fe( sacsac )2(CO)2 in chloroform are reported ( sacsac - = C5H7S2- = dithioacetylacetonate anion = pentane-2,4-dithionate anion). Fe( sacsac )2 is reversibly reduced to [Fe( sacsac )2]-, but no other redox processes are observed within the solvent limits. Fe( sacsac )2(CO)2 undergoes a reversible one-electron reduction followed by rapid loss of carbon monoxide to generate [Fe( sacsac )2]-. The oxidation of Fe( sacsac )2(CO)2 results in the oxidation of a dithioacetylacetonate ligand to the 3,5-dimethyl-1,2-dithiolium cation and the formation of a previou

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3

Klein, Hans-Friedrich, Goetz Lull, Birgit Rodenhäuser, Gerhard Cordier, and Helmut Paulus. "Monoolefincobalt(0)-Komplexe / Monoolefincobalt(0) Complexes." Zeitschrift für Naturforschung B 43, no. 10 (1988): 1256–62. http://dx.doi.org/10.1515/znb-1988-1008.

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Mononuclear cobalt(o) complexes containing olefin and trimethylphosphane ligands Co(olefin)(PMe3)3 (olefin = C2H4 (1), C3H6 (2), cyclopentene (3), trans-1,2-diphenylethene (4), tetrafluorobenzo-bicyclo-(2.2.2)-octadiene (5)), are obtained from CoCl2 by reaction with magnesium in the presence of the ligands or by substitution of 3 with olefin. X-ray crystal structure determinations of 4 and 5 show a distorted tetrahedral arrangement of ligands around the cobalt atom. Chemical and spectroscopic properties are consistent with a paramagnetic valence state of the compounds in solution. By reaction

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4

Pörschke, Klaus-Richard, Christian Pluta, Bernd Proft, Frank Lutz, and Carl Krüger. "Bis(di-tert-butylphosphino)ethan-nickel(0)-Komplexe / Bis(di-tert-butylphosphino)ethane-nickel(0) Complexes." Zeitschrift für Naturforschung B 48, no. 5 (1993): 608–26. http://dx.doi.org/10.1515/znb-1993-0511.

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Ni(cdt) reacts with tBu2Bu2PC2H4P4P'Bu2 in pentane at 20°C to yield brownish crystals of (tBu2Bu2PC2H4P4P'Bu2)Ni(η2-C12H18) (1). The molecular structure of 1, as established by X-ray crystallography, exhibits a trigonal-planar coordination geometry of the nickel center with a η2bonded cdt ligand. In the crystal 1 exists as two enantiomers, which are determined by the leftor right-handed screw axis of the cdt ligand. The cdt ligand in 1 resists most typical displacement reactions but 1 reacts with CO at – 78°C to afford the colorless 18e complex (tBu2Bu2PC2H4P4P'Bu2)Ni(CO)2 (2). From the reacti

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5

Kreiter, Cornelius G., Eduard Michels, and Jürgen Kaub. "Chrom(0)-und Molybdän(0)-Komplexe von 11-Isopropyliden-bicyclo[4.4.1]undeca-2,4,8-trienen / Chromium(0) and Molybdenum(0) Complexes of 11-Isopropylidene-bicyclo[4.4. 1]undeca-2,4,8-trienes." Zeitschrift für Naturforschung B 41, no. 6 (1986): 722–30. http://dx.doi.org/10.1515/znb-1986-0610.

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11-Isopropylidene-bicyclo[4.4.1]undeca-2,4,8-triene (IBU, 1A) and five alkyl substituted derivatives (1B-1F) contain a conjugated diene unit and two isolated CC-double bonds, one exocyclic and one incorporated into the bicvclus, each suited for complexation to transition metals. With [Cr(CO)3(CH3CN)3] (2) 1A-1F form [Cr(CO)3(η6-IBU)] complexes (3A−3F). in which the IBU ligands are coordinated to the chromium via the diene unit and the exocyclic CC-double bond. The corresponding [Mo(CO)3(η6-IBU)] complexes (5A−5F) are obtained from the reactions of [Mo(CO)3(diglyme)] (4) with 1A−1F. In additio

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6

Knoll, Christian, Danny Müller, Marco Seifried, et al. "Cooperativity in spin crossover materials as ligand's responsibility – investigations of the Fe(ii) – 1,3-bis((1H-tetrazol-1-yl)methyl)bicyclo[1.1.1]pentane system." Dalton Transactions 47, no. 16 (2018): 5553–57. http://dx.doi.org/10.1039/c8dt00781k.

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In [Fe(ppditz)<sub>3</sub>]X<sub>2</sub>, X = BF<sub>4</sub><sup>−</sup>, ClO<sub>4</sub><sup>−</sup>, PF<sub>6</sub><sup>−</sup> spin crossover complexes the observed cooperativity originates only from the rigidity and internal strain of the ligand.

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7

MASH, E. A., T. M. GREGG, and M. A. KACZYNSKI. "ChemInform Abstract: Diastereoselective Manipulations of Bicyclo(m.1.0)alkane Derivatives. Part 2. Nucleophilic Additions to the Carbonyl Carbons of Bicyclo(m.1. 0)alkan-2-ones." ChemInform 27, no. 34 (2010): no. http://dx.doi.org/10.1002/chin.199634091.

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8

Yang, Ying-Qun, Wei Li, Zhi-Min Chen, and Li-Xia Fu. "Crystal Structure and Properties of a New Copper(II) Complex Cu2(phen)2[C7H8(COO)2]2 (H2O)4:5." Zeitschrift für Naturforschung B 67, no. 9 (2012): 872–76. http://dx.doi.org/10.5560/znb.2012-0097.

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A new complex Cu2(phen)2[C7H8(COO)2]2 (H2O)4:5 (1) has been synthesized, with the dianion of bicyclo[2.2.1] hept-2-ene-5,6-dicarboxylic acid [C7H8(COOH)2] (LH2) and 1,10-phenanthroline (phen) as ligands. In 1, L2- anions link Cu(II) cations to form two binuclear structure units, in which each Cu(II) cation is coordinated by five donor atoms to give a distorted square-pyramidal geometry. The magnetic data of 1 show that it exhibits weak antiferromagnetic properties at low temperature. When the excitation wavelength is at 470 nm, it has an intense photoluminescence. In addition, the cyclovoltamm

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9

Adcock, James L., and Andrei A. Gakh. "Synthesis of novel cage quaternary salts via nucleophilic substitution of 1,3-diiodobicyclo[1.1.1]pentane. Further evidence for a stable 3-iodo-1-bicyclo[1.1.1]pentyl cation." Tetrahedron Letters 33, no. 34 (1992): 4875–78. http://dx.doi.org/10.1016/s0040-4039(00)61221-2.

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10

Parvez, Masood, Ted S. Sorensen, and Fang Sun. "Conformational analysis of the bicyclo - [4.4.1]undecan-11-one ring system." Canadian Journal of Chemistry 80, no. 3 (2002): 245–49. http://dx.doi.org/10.1139/v02-022.

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The first conformational analysis of a bicyclo[4.4.1]undecan-11-one system (1) is presented. Based on low-temperature 13C NMR line-broadening measurements and an X-ray structure of the 1,6-dibromo derivative (2), this ketone adopts a chiral conformation with approximate C2 symmetry about an axis containing the >C=0 bond. The observed NMR line-broadening results are consistent with a dynamic interchange of M and P enantiomeric C2 conformations, or expressed another way, the "effective" development of an additional Cs symmetry plane bisecting the molecule at right angles to the plane containi

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11

Adcock, William, and Alexander R. Krstic. "Through-space transmission of polar substituent effects in the bicyclo[1.1.1]pentane ring system as monitored by119Sn NMR chemical shifts: a13C and119Sn NMR study of 3-substituted-(X)bicyclo[1.1.1]pent-1-yltrimethylstannanes." Magnetic Resonance in Chemistry 35, no. 10 (1997): 663–70. http://dx.doi.org/10.1002/(sici)1097-458x(199711)35:10<663::aid-omr144>3.0.co;2-7.

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12

Jonas, Klaus, Peter Klusmann, and Richard Goddard. "Pentamethylcyclopentadienylbis(ethen)eisen - ein 17e-Halbsandwichkomplex mit leicht verdrängbaren Ethenliganden / Pentamethylcyclopentadienylbis(ethene)iron - a 17e Halfsandwich Complex with Easily Displaceable Ethene Ligands." Zeitschrift für Naturforschung B 50, no. 3 (1995): 394–404. http://dx.doi.org/10.1515/znb-1995-0313.

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The new room temperature stable halfsandw ich complex Cp*Fe(tmeda)Cl (2) has been synthesized by the 1:1 reaction of FeCl2(thf)1.5 with LiCp* in a mixture of THF and TMEDA at - 30 °C. 2 is an ideal starting material for the synthesis of a wide range of new iron complexes. Treatment of 2 with lithium sand in THF in the presence of COD or ethene followed by the addition of TMEDA yields the ferrates [Li(tmeda)][Cp*Fe(cod)] (3) or [Li(tmeda)][Cp*Fe(C2H4)2] (4). By delithiation with dichloroethane, 3 and 4 can be transformed into the novel 17 e iron complexes Cp*Fe(cod) (5) and Cp*Fe(C2H4)2 (6). 6

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13

Morkan, Izzet Amour, та Ayşe Uztetik Morkan. "Cycloaddition Reactions of (η6-Tropone)tricarbonylmetal(0) Complexes of Group 6 Metals with Alkynes". Collection of Czechoslovak Chemical Communications 67, № 11 (2002): 1635–46. http://dx.doi.org/10.1135/cccc20021635.

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(η6-Cyclohepta-2,4,6-trien-1-one)tricarbonylmetal(0) complexes of chromium (2a), molybdenum (2b), and tungsten (2c) are formed when tris(acetonitrile)tricarbonylchromium(0), -molybdenum(0), and -tungsten(0), respectively, are treated photochemically with tropone (cyclohepta-2,4,6-trien-1-one) 1. UV photolysis of 2a-2c and RC≡CR' (R = R' = Ph, Me3Si, Et; R = Ph, R' = Me3Si) in toluene gives the [6+2] cycloadducts, (η4,η2-8,9-diphenylbicyclo[4.2.1]nona-3,5,8-trien-1-one)tricarbonylmetal(0) 3a-3c, (η4,η2-8,9-bis(trimethylsilyl)bicyclo[4.2.1]nona-3,5,8-trien-1-one)tricarbonylmetal(0) 4a-4c, (η4,η2

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14

Guilet, Richard, Jacques Swartzentruber, André Loupy, et al. "Améliorations de procédés de synthèse d'une lactone bicyclique: le 1-phényl-2-oxo-3-oxa bicyclo [3:1:0] hexane." Comptes Rendus de l'Académie des Sciences - Series IIC - Chemistry 1, no. 10 (1998): 651–60. http://dx.doi.org/10.1016/s1387-1609(99)80021-8.

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15

Lay, PA, AF Masters, and CD Wasiowych. "The Reactions of Electrogenerated [Ni(sacsac)2]-: Biomimetic Chemistry Related to Nickel Enzymes." Australian Journal of Chemistry 48, no. 4 (1995): 835. http://dx.doi.org/10.1071/ch9950835.

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The electrochemical reduction of [Ni( sacsac )2] ( sacsac = C5H7S2- = pentane-2,4-dithionate) has been investigated by cyclic voltammetry and controlled-potential electrolysis in acetone/tetra- butylammonium tetrafluoroborate (0.1 M). The reactions of the reduction product(s) with CO, CO2, CH3I, C12H25SH, light and water have been surveyed. At a scan rate of 100 mV s-1, [Ni( sacsac )2] (0.5 mM ) undergoes a quasi-reversible one-electron reduction (∆ Ep = 88 mV) at -1.543 V (v. Fc+/0) and an irreversible four-electron oxidation at +0.635 V. The oxidation generates the 3,5-dimethyl-1,2-dithioliu

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16

Zieliński, Marek, Ewa Twardowska, and Małgorzata Kucharska. "Pentane-1-ol and its isomers. Determination in workplace air with GC with Flame Ionization Detector (GC-FID)." Podstawy i Metody Oceny Środowiska Pracy 35, no. 1(99) (2019): 75–88. http://dx.doi.org/10.5604/01.3001.0013.0807.

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Amyl alcohol (pentan-1-ol) – C5H12O or C5H11OH – is an organic chemical compound from the group of saturated monohydric aliphatic alcohols. There are 8 known isomers of pentanol: pentan-1-ol (CAS:71-41-0), pentan-2-ol (CAS: 6032-29-7), pentan-3-ol (CAS: 584-02-1), 2-metylobutan-1-ol (CAS: 137-32-6), 3-metylobutan-1-ol (CAS: 123-51-3), 2-metylobutan-2-ol (CAS: 75-85-4), 3-metylobutan-2-ol (CAS: 598-75-4) i 2,2-dimetylopropan-1-ol (CAS: 75-84-3). All of them are commonly referred to as amyl alcohols. Pentanol isomers exhibit chemical properties characteristic of aliphatic alcohols, they are obta

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17

Rannabauer, Stefan, Tassilo Habereder, Heinrich Nöth, and Wolfgang Schnick. "Synthesis, Spectroscopic Properties, and Crystal Structure of the Oxonium Acid [H(OEt2)2]+[Ti2Cl9]–." Zeitschrift für Naturforschung B 58, no. 8 (2003): 745–50. http://dx.doi.org/10.1515/znb-2003-0805.

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The oxonium acid [H(OEt2)2]+[Ti2Cl9]− (1) was obtained by the reaction of TiCl4 with Et2O in n-pentane and subsequent partial hydrolysis. Suitable single crystals of 1 were obtained by sublimation at 5° C ([H(OEt2)2]+[Ti2Cl9]−, P212121 (no. 19), Z = 4, a = 1101.08(8), b = 1328.4(2), c = 1525.0(2) pm, T = 193(2) K, 4489 independent reflections, 197 parameters, R1 = 0.049). The cation is made up from two independent Et2O molecules and one disordered proton on two split positions. Both ether molecules exhibit a W form, and their molecular planes include an angle of 74.1(7)°. Thus a distorted tetr

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18

Sorensen, T. S., and F. Sun. "In situ preparation of cyclopropanones with the bicyclo[3.1.0]hexan-6-one skeleton (substituted examples of the Loftfield intermediate). Confirmation of a very facile intramolecular alkyl cyclopropanone – dienol rearrangement." Canadian Journal of Chemistry 74, no. 1 (1996): 79–87. http://dx.doi.org/10.1139/v96-010.

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Four substituted bicyclo[3.1.0]hexan-6-ones (cyclopropanones) were prepared in situ, starting from the corresponding 2,6-dibromocyclohexanone and reductively removing the bromine atoms with the organometallic salt PPN+Cr(CO)4NO− The reaction is essentially instantaneous at −78 or−100 °C, and can be conveniently carried out in an NMR tube for easy characterization of the products by low-temperature 1H and 13C NMR spectroscopy. The1,5-di-tert-butyl and 1-tert-butyl analogs were thermally stable to ca. 0 °C, but the 1-tert-butyl-5-methyl and 1-tert-butyl-5-ethyl derivatives were extremely labile,

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19

Sirtori, Francesco, Corrado Dimauro, Riccardo Bozzi, et al. "Evolution of volatile compounds and physical, chemical and sensory characteristics of Toscano PDO ham from fresh to dry-cured product." European Food Research and Technology 246, no. 3 (2019): 409–24. http://dx.doi.org/10.1007/s00217-019-03410-0.

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AbstractPhysical and chemical changes in Toscano ham lean were evaluated according to three different seasoning time (14, 16 and 18 months). Moreover, on Semimembranosus muscle, the volatile profile at 0, 1, 3, 6, 12, 14, 16 and 18 months of seasoning was determined by SPME–GC–MS. Eventually, a quantitative-descriptive sensory evaluation was performed. Longer seasoning times led to a decrease of Chroma in Biceps femoris, and also protein and proteolysis index decreased as the seasoning time increased. A total of 97 volatile compounds (VOCs) belonging to seven chemical families (29 aldehydes, 1

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20

Darwish, Mohamed S. A., and Laila M. Al-Harbi. "The Influence of Self-Heating Iron on the Thermal, Mechanical, and Swelling Properties of PDMS Composites for Organic Solvents Removal." Polymers 13, no. 23 (2021): 4231. http://dx.doi.org/10.3390/polym13234231.

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Volatile organic compounds pollute the environment and pose a serious threat to human health due to their toxicity, mutagenicity, and carcinogenicity. In this context, it is highly desirable to fabricate high-performance poly (dimethylsiloxane) (PDMS) composites to remove organic solvents from the environment using a simple technique. Therefore, in the present study, Fe-PDMS composites were fabricated using a technique based on magnetic induction heating with iron particles serving as a self-heating agent. Under an alternating magnetic field, the iron particles served as a thermal source that

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21

Wang, Yao H., J. Leibholz, W. L. Bryden, and D. R. Fraser. "Lipid peroxidation status as an index to evaluate the influence of dietary fats on vitamin E requirements of young pigs." British Journal of Nutrition 75, no. 1 (1996): 81–95. http://dx.doi.org/10.1079/bjn19960112.

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The aims of the present study were to establish a suitable criterion for estimating the vitamin E requirement for young pigs, and to investigate the influence of dietary fats on the requirement of this nutrient. In Expt 1 weaned pigs were given a semi-purified diet supplemented with 0,20, or 100 mg DL- α-tocopheryl acetate/kg. Pigs in Expt 2 were fed on diets containing 10 g sunflower oil (SO) stripped of vitamin E/kg in diets 1 and 2, 100 g SO/kg in diets 3 and 4, and 100 g tallow/kg in diet 5. Diets 2, 4 and 5 were supplemented with DL-α-tocopheryl acetate at 20 mg/kg for 0·28 d and 50 mg/kg

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22

Deacon, Glen B., Tiecheng Feng, Peter C. Junk, Brian W. Skelton, Alexander N. Sobolev, and Allan H. White. "Preparation and X-Ray Crystal Structures of Tetrahydrofuran-Complexed Rare Earth Chlorides — a Structurally Rich Series." Australian Journal of Chemistry 51, no. 1 (1998): 75. http://dx.doi.org/10.1071/c97174.

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Anhydrous lanthanoid metal chlorides LnCl3(thf)n (Ln = La, Ce, Nd, Sm, n = 2; Ln = Tb, Ho, n = 2·5; Ln = Dy, Tm, n= 2·7; Ln = Gd, Yb, Lu, n = 3; Ln = Er, n = 3·5) have been prepared in excellent yield by the direct reaction of the lanthanoid metal powders with hexachloroethane in tetrahydrofuran (thf), and (Ln = Eu, n = 0·8; Ln = La, n = 1·7; Ln = Pr, n = 2; Ln = Gd, n = 2·5; Ln = Er, n = 3) in good yield except for EuCl3(thf)0·8 from bulk metal. [YbCl3(thf)2]2 was prepared by prolonged treatment of solid YbCl3(thf)3 with pentane. The X-ray crystal structures of [LnC3(thf)2] (Ln = La, Ce or Pr

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23

Lee, Hyo Eun, Bong-Woo Lee, and Jeong Hun Kim. "Investigating VOCs Speciation Characteristics at the Fenceline of Synthetic Rubber Manufacturing Industries via Active and Passive Monitoring Techniques." Atmosphere 14, no. 7 (2023): 1119. http://dx.doi.org/10.3390/atmos14071119.

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Volatile Organic Compounds (VOCs) are prevalent emissions from a plethora of industries, known for their role in the formation of atmospheric ozone, thus contributing to secondary pollution. Both the United States and the European Union have presented various regulatory measures to mitigate VOC emissions. Nevertheless, the diversity of VOCs, some exhibiting carcinogenic properties, pose substantial challenges in devising comprehensive mitigation strategies. In light of this, the current study focuses on the synthetic rubber manufacturing industry, specifically analyzing VOCs with high emission

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24

Anderson, Joseph M., Darren L. Poole, Gemma C. Cook, John A. Murphy, and Nicholas David Measom. "Organometallic Bridge Diversification of Bicyclo[1.1.1]pentanes." Chemistry – A European Journal, December 20, 2023. http://dx.doi.org/10.1002/chem.202304070.

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Bicyclo[1.1.1]pentane (BCP) derivatives have attracted significant recent interest in drug discovery as alkyne, tert‐butyl and arene bioisosteres, where their incorporation is frequently associated with increased compound solubility and metabolic stability. While strategies for functionalisation of the bridgehead (1,3) positions are extensively developed, platforms allowing divergent substitution at the bridge (2,4,5) positions remain limited. Recent reports have introduced 1‐electron strategies for arylation and incorporation of a small range of other substituents, but are limited in terms of

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"Silaheterocyclen, XXVII. Substituenteneffekte zur Steuerung des Cycloadditionsverhaltens von Silaethenen [1] / Silaheterocycles, XXVII. Controlling the Cycloaddition Behavior of Silenes by Substituent Effects [1]." Zeitschrift für Naturforschung B 49, no. 6 (1994): 831–43. http://dx.doi.org/10.1515/znb-1994-0618.

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The silene Cl2Si=C(Ph)CH2But (2) is formed by the reaction of 1,1,1-trichloro-2-phenyll- silaprop-2-ene (1) with LiBut in n-pentane in the temperature range from -15 to 0 °C. The reaction initially leads to the corresponding α-lithio adduct A (addition of LiBut to the vinyl group of 1); subsequent LiCl elimination yields 2 as an intermediate. 2 can be trapped by Me3SiOMe (3) and dienes which add across the Si=C bond. In the absence of trapping agents but in the presence of the Lewis base NEt3 the mixture 1/LiBut reacts to give the disilacyclobutane 4. Due to its electronic and steric propertie

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Meena, Khem Raj, Rajni Dhiman, Kailash Singh, et al. "Purification and identification of a surfactin biosurfactant and engine oil degradation by Bacillus velezensis KLP2016." Microbial Cell Factories 20, no. 1 (2021). http://dx.doi.org/10.1186/s12934-021-01519-0.

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AbstractEngine oil used in automobiles is a threat to soil and water due to the recalcitrant properties of its hydrocarbons. It pollutes surrounding environment which affects both flora and fauna. Microbes can degrade hydrocarbons containing engine oil and utilize it as a substrate for their growth. Our results demonstrated that cell-free broth of Bacillus velezensis KLP2016 (Gram + ve, endospore forming; Accession number KY214239) recorded an emulsification index (E24%) from 52.3% to 65.7% against different organic solvents, such as benzene, pentane, cyclohexane, xylene, n-hexane, toluene and

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