Relevant bibliographies by topics / Unsaturated reactance

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Academic literature on the topic 'Unsaturated reactance'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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Journal articles on the topic "Unsaturated reactance"

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Moran, Joseph, and Michael J. Krische. "Formation of C–C bonds via ruthenium-catalyzed transfer hydrogenation." Pure and Applied Chemistry 84, no. 8 (2012): 1729–39. http://dx.doi.org/10.1351/pac-con-11-10-18.

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Ruthenium-catalyzed transfer hydrogenation of diverse π-unsaturated reactants in the presence of aldehydes provides products of carbonyl addition. Dehydrogenation of primary alcohols in the presence of the same π-unsaturated reactants provides identical products of carbonyl addition. In this way, carbonyl addition is achieved from the alcohol or aldehyde oxidation level in the absence of stoichiometric organometallic reagents or metallic reductants. In this account, the discovery of ruthenium-catalyzed C–C bond-forming transfer hydrogenations and the recent development of diastereo- and enanti
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2

Shin, Jung-Ah, Yea-Jin Hong, and Ki-Teak Lee. "Development and Physicochemical Properties of Low Saturation Alternative Fat for Whipping Cream." Molecules 26, no. 15 (2021): 4586. http://dx.doi.org/10.3390/molecules26154586.

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We developed an alternative whipping cream fat using shea butter but with low saturation. Enriched stearic-oleic-stearic (SOS) solid fat was obtained from shea butter via solvent fractionation. Acyl migration reactant, which mainly contains asymmetric SSO triacylglycerol (TAG), was prepared through enzymatic acyl migration to obtain the creaming quality derived from the β’-crystal form. Through enzymatic acyl migration, we obtained a 3.4-fold higher content of saturated-saturated-unsaturated (SSU) TAG than saturated-unsaturated-saturated (SUS) TAG. The acyl migration reactant was refined to ob
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Jiang, Jing, Yuan Cai та Lixin Tang. "A Green and Efficient Michael Addition of Indoles to α, β-unsaturated Electron-deficient Compounds and Synthesis of Bis-indolylmethanes Catalyzed by Gallium Dodecyl Sulfate [Ga(DS)3] in Water". Journal of New Materials for Electrochemical Systems 20, № 1 (2017): 031–37. http://dx.doi.org/10.14447/jnmes.v20i1.292.

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α, β-unsaturated electron-deficient compounds and bis-indolylmethanes were successfully synthesized by gallium dodecyl sul-fate (Ga(DS)3) catalyzed Michael addition using indoles and α, β-unsaturated ketones(or aldehyde) as reactant, respectively. The samples were characterized by 1H NMR (400 MHz), HRMS, and Electrothermal Digital Melting-point. The results showed that the α, β-unsaturated electron-deficient compounds and bis-indolylmethanes could be effectively catalyzed by using Ga(DS)3 to give the corresponding adducts in good to excellent yields in water media.
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Moiseev, Dmitry V., Paolo Marcazzan та Brian R. James. "Reversible decomposition of mono(α-hydroxy)phosphines and their reaction with α,β-unsaturated aldehydes". Canadian Journal of Chemistry 87, № 4 (2009): 582–90. http://dx.doi.org/10.1139/v09-021.

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The mono(α-hydroxy)phosphines R2PCH(OH)R′ (R = Ph, R′ = H, Et, CH2Ph, Ph, p-X-C6H4; R = cyclohexyl, R′ = Ph) are prepared under solvent-free conditions by a 1:1 reaction of Ph2PH with the appropriate aldehyde, and their stabilities (with respect to reversible dissociation into reactants), studied in DMSO, Et2O, and MeOH, increase with decreased basicity of the hydroxyphosphine; for example, for the Ph2PCH(OH)C6H4-p-X phosphines, stability decreases in the order: X = CN > Cl > F > H > Me > OMe. A 1:1 room-temperature reaction of the (α-hydroxy)phosphines (except for R′ = H) with
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Strickler, Rick R., John M. Motto, Craig C. Humber та Adrian L. Schwan. "Stereospecific Grignard reactions of cholesteryl 1-alkenesulfinate esters: Application of the Andersen Protocol to the preparation of non-racemic α,β-unsaturated sulfoxides". Canadian Journal of Chemistry 81, № 6 (2003): 423–30. http://dx.doi.org/10.1139/v03-002.

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Enantiomerically enriched α,β-unsaturated sulfinate esters of (–)-cholesterol undergo stereospecific substitutions at sulfur when treated in benzene at 6°C with Grignard reagents. Sulfoxides with ees of 85–99.5% are obtained when enantiopure sulfinates are used. The substitution reactions proceed with inversion of sulfur configuration. Enantiomerically pure cholesteryl (E)-2-carbomethoxyethenesulfinate is not a suitable reactant under the Grignard reaction conditions. It is suggested that the ester group induces unwanted reactions significantly lowering both the yield and sulfur stereogenicity
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Cherian, Benny, and Eby Thomas Thachil. "Synthesis of Unsaturated Polyester Resin—Effect of Sequence of Addition of Reactants." Polymer-Plastics Technology and Engineering 44, no. 5 (2005): 931–38. http://dx.doi.org/10.1081/pte-200060872.

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M. Silaev, Michael. "Kinetics of Free-Radical Addition Processes by the Nonbranched-Chain Mechanism." Journal of Advance Research in Applied Science (ISSN: 2208-2352) 3, no. 10 (2016): 01–19. http://dx.doi.org/10.53555/nnas.v3i10.645.

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Five reaction schemes are suggested for the initiated nonbranched-chain addition of free radicals to the multiple bonds of the unsaturated compounds. The proposed schemes include the reaction competing with chain propagation reactions through a reactive free radical. The chain evolution stage in these schemes involves three or four types of free radicals. One of them is relatively low-reactive and inhibits the chain process by shortening of the kinetic chain length. Based on the suggested schemes, nine rate equations (containing one to three parameters to be determined directly) are deduced us
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Jeon, Eun Hee, Sena Yang, Sung Ho Kang, Sehun Kim, and Hangil Lee. "Investigation of the interaction between a novel unnatural chiral ligand and reactant on palladium for asymmetric hydrogenation." Physical Chemistry Chemical Physics 17, no. 27 (2015): 17771–77. http://dx.doi.org/10.1039/c5cp01896j.

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We report about the mechanistic studies of the reaction between a newly synthesized (S)-2-((R)-3H-dinaphtho[2,1-c:1′,2′-e]azepin-4(5H)-yl)-2-phenylethanol based on the binaphthyl skeleton and (E)-2-methyl-5-phenylpent-2-enoic acid for the asymmetric hydrogenation of α,β-unsaturated acids with heterogeneous palladium catalysts.
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Silaev, M. M. "Competition Kinetics of the Nonbranched-Chain Addition of Free Radicals to Olefins, Formaldehyde, and Oxygen." International Journal of Chemical Engineering 2011 (2011): 1–19. http://dx.doi.org/10.1155/2011/830610.

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Five reaction schemes are suggested for the initiated nonbranched-chain addition of free radicals to the multiple bonds of alkenes, formaldehyde, and oxygen. The schemes include reactions competing with chain propagation through a reactive free radical. The chain evolution stage in these schemes involves three or four types of free radicals. One of them— , , , , or —is relatively low-reactive and inhibits the chain process by shortening of the kinetic chain length. Based on the suggested schemes, nine rate equations containing one to three parameters to be determined directly are set up using
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Colmán, Elizabeth Gaona, María B. Blanco, Ian Barnes, and Mariano A. Teruel. "Ozonolysis of a series of C7–C9 unsaturated biogenic aldehydes: reactivity study at atmospheric pressure." RSC Advances 5, no. 39 (2015): 30500–30506. http://dx.doi.org/10.1039/c4ra17283c.

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Rate coefficients for the reactions of ozone with the biogenic aldehydes trans-2-heptenal, trans-2-octenal and trans-2-nonenal have been determined in an environmental chamber at 298 K in 990 mbar air using in situ FTIR spectroscopy to monitor the reactants.
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Book chapters on the topic "Unsaturated reactance"

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Amir Khairbek, Ali. "Quantum Calculations to Estimate the Heat of Hydrogenation Theoretically." In Hydrogen Implementation in Transportation Sector [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.93955.

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Standard enthalpies of hydrogenation of 29 unsaturated hydrocarbon compounds were calculated in the gas phase by CCSD(T) theory with complete basis set cc-pVXZ, where X = DZ, TZ, as well as by complete basis set limit extrapolation. Geometries of reactants and products were optimized at the M06-2X/6-31g(d) level. This M06-2X geometries were used in the CCSD(T)/cc-pVXZ//M06-2X/6-31g(d) and cc-pV(DT)Z extrapolation calculations. (MAD) the mean absolute deviations of the enthalpies of hydrogenation between the calculated and experimental results that range from 8.8 to 3.4 kJ mol−1 based on the Co
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Bansal, Anshul. "General Principles of Organic Reaction Mechanism." In Basics of Organic Chemistry: A Textbook for Undergraduate Students. BENTHAM SCIENCE PUBLISHERS, 2024. http://dx.doi.org/10.2174/9789815223224124010004.

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This chapter presents an in-depth examination of the fundamental principles underlying organic reaction mechanisms, a critical area for understanding and predicting chemical behavior in organic chemistry. The chapter begins with arrow notations, the symbolic representation of electron movement in chemical reactions, which provides a visual and conceptual framework for tracking changes during reactions. The roles of various reagents are explored, differentiating between electrophiles and nucleophiles based on their electronaccepting and electron-donating characteristics. This distinction is cru
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Calvert, Jack G., John J. Orlando, William R. Stockwell, and Timothy J. Wallington. "Mechanisms of Ozone Reactions in the Troposphere." In The Mechanisms of Reactions Influencing Atmospheric Ozone. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190233020.003.0005.

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In Chapter I, we identified the origin of stratospheric ozone and its role in limiting the short wavelengths of sunlight reaching the Earth. We also saw the importance of trace impurities of NOx and hydrocarbons in the development of tropospheric ozone. In this chapter, we review and evaluate the chemical reactions of ozone that create the important hydroxyl (HO) radical. It is the photodecomposition of tropospheric ozone that is the major source of the important HO radical, and it is the HO radical that initiates the destruction of most of the reactive trace gases that are emitted into the at
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Doraiswamy, L. K. "Homogeneous Catalysis." In Organic Synthesis Engineering. Oxford University Press, 2001. http://dx.doi.org/10.1093/oso/9780195096897.003.0014.

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Catalysis by soluble complexes of transition metals is a rapidly gaining mode of catalysis in organic synthesis. These metals form bonds with one or more carbons in an organic reactant resulting in complexes that are known as organometallic complexes. Catalysis by these complexes is often referred to as homogeneous catalysis. Among the important applications of homogeneous catalysis in organic synthesis are isomerization of olefins; hydrogenation of olefins (carried out using Wilkinson type catalysts); oligomerization; hydroformylation of olefins to aldehydes with CO and H2 (the oxo process);
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Conference papers on the topic "Unsaturated reactance"

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Bright, C. G. "A theoretical derivation of the unsaturated d-axis reactances of synchronous machines from first principles." In 4th IET International Conference on Power Electronics, Machines and Drives (PEMD 2008). IEE, 2008. http://dx.doi.org/10.1049/cp:20080566.

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Gan, Mingfei, and Lea-Der Chen. "Analytical Solution for Two-Phase Flow in PEMFC Gas Diffusion Layer." In ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2006. http://dx.doi.org/10.1115/fuelcell2006-97104.

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Thermal and water management is critical to fuel cell performance. It has been shown that gas diffusion layer (GDL) can impose the mass transport limit; for example, it can block the reactant transport to active layer when flooding occurs at high current density conditions. Micro porous layer (MPL) in conjunction with backing layer (BL) has been used as a GDL material and was shown to be effective for water management. To study the transport processes in GDL and MPL modified GDL, an analytical solution is derived current study for calculation of two-phase, multicomponent transport in GDL. Two
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