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Gotowe bibliografie tematyczne / Hydride Transfer Chemistry

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Gotowa bibliografia na temat „Hydride Transfer Chemistry”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Hydride Transfer Chemistry"

1

McSkimming, Alex, Jordan W. Taylor, and W. Hill Harman. "Assembly and Redox-Rich Hydride Chemistry of an Asymmetric Mo2S2 Platform." Molecules 25, no. 13 (2020): 3090. http://dx.doi.org/10.3390/molecules25133090.

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Although molybdenum sulfide materials show promise as electrocatalysts for proton reduction, the hydrido species proposed as intermediates remain poorly characterized. We report herein the synthesis, reactions and spectroscopic properties of a molybdenum-hydride complex featuring an asymmetric Mo2S2 core. This molecule displays rich redox chemistry with electrochemical couples at E½ = −0.45, −0.78 and −1.99 V vs. Fc/Fc+. The corresponding hydrido-complexes for all three redox levels were isolated and characterized crystallographically. Through an analysis of solid-state bond metrics and DFT calculations, we show that the electron-transfer processes for the two more positive couples are centered predominantly on the pyridinediimine supporting ligand, whereas for the most negative couple electron-transfer is mostly Mo-localized.

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Fukuzumi, Shunichi, Toshiaki Kitano, Masashi Ishikawa, and Yoshiharu Matsuda. "Electron transfer chemistry of hydride and carbanion donors. Hydride and carbanion transfer via electron transfer." Chemical Physics 176, no. 2-3 (1993): 337–47. http://dx.doi.org/10.1016/0301-0104(93)80244-4.

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Chan, Bun, and Masanari Kimura. "High-level quantum chemistry exploration of reduction by group-13 hydrides: insights into the rational design of bio-mimic CO₂ reduction." Electronic Structure 4, no. 4 (2022): 044001. http://dx.doi.org/10.1088/2516-1075/ac9bb3.

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Abstract In the present study, we have used computational quantum chemistry to explore the reduction of various types of substrates by group-13 hydrides. We use the high-level L-W1X method to obtain the energies for the constituent association and hydride transfer reactions. We find that the hydride transfer reactions are highly exothermic, while the preceding association reactions are less so. Thus, improving the thermodynamics of substrate association may improve the overall process. Among the various substrates, amine and imine show the strongest binding, while CO2 shows the weakest. Between the group-13 hydrides, alanes bind most strongly with the substrates, and they also have the most exothermic hydride transfer reactions. To facilitate CO2 binding, we have examined alanes with electron-withdrawing groups, and we indeed find CF3 groups to be effective. Drawing inspiration from the RuBisCO enzyme for CO2 fixation, we have further examined the activation of CO2 with two independent AlH(CF3)2 molecules, with the results showing an even more exothermic association. This observation may form the basis for designing an effective dialane reagent for CO2 reduction. We have also assessed a range of lower-cost computational methods for the calculation of systems in the present study. We find the DSD-PBEP86 double-hybrid DFT method to be the most suitable for the study of related medium-sized systems.

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4

Bohra, Anupama, Pradeep K. Sharma, and Kalyan K. Banerji. "Kinetics and Mechanism of the Oxidation of Aliphatic Aldehydes by Benzyltrimethylammonium Chlorobromate." Journal of Chemical Research 23, no. 5 (1999): 308–9. http://dx.doi.org/10.1177/174751989902300506.

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5

Zhao, Yin, Helmut W. Schmalle, Thomas Fox, Olivier Blacque, and Heinz Berke. "Hydride transfer reactivity of tetrakis(trimethylphosphine)(hydrido)(nitrosyl)molybdenum(0)." Dalton Trans., no. 1 (2006): 73–85. http://dx.doi.org/10.1039/b511797f.

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6

Wel, Hans van der, Nico M. M. Nibbering, and Margaret M. Kayser. "A gas phase study of the regioselective BH4− reduction of some 2-substituted maleic anhydrides." Canadian Journal of Chemistry 66, no. 10 (1988): 2587–94. http://dx.doi.org/10.1139/v88-406.

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Gas phase ion/molecule reactions in a Fourier transform ion cyclotron resonance mass spectrometer have been carried out for reductions of isotopically labelled citraconic (methylmaleic), phenylmaleic, and ethoxymaleic anhydrides by BH4−. In citraconic anhydride the carbonyl group neighbouring the methyl substituent is reduced preferentially in agreement with the ab initio calculations, which show the higher LUMO coefficients at this site. Hydride ion transfer to the olefinic double bond occurs as well; however, in that case no preference for either of the carbon atoms is observed. In phenylmaleic anhydride strong indications are found for a theoretically unexpected hydride ion transfer to the phenyl ring. For ethoxymaleic anhydride experimental evidence is presented showing hydride ion transfer to the carbon atom carrying the ethoxy group, which is in agreement with the "best overlap" consideration predicting that this carbon atom bears the highest LUMO coefficient.Most of the hydride transfers from BH4− to the molecules studied seem, therefore, to take place under orbital control rather than under control of long-range ion-induced dipole interactions between reactants.

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7

Zaman, Khan M., Norio Nishimura, Shunzo Yamamoto, and Yoshimi Sueishi. "Hydride transfer reactions of Michler's hydride with different ?-accetors." Journal of Physical Organic Chemistry 7, no. 6 (1994): 309–15. http://dx.doi.org/10.1002/poc.610070607.

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8

FUKUZUMI, SHUNICHI, and SOUTA NOURA. "Cobalt(III) Porphyrin-catalysed Hydride Reduction of 10-Methylacridinium ion and Hydrometallation of Alkenes and Alkynes by Tributyltin Hydride." Journal of Porphyrins and Phthalocyanines 01, no. 03 (1997): 251–58. http://dx.doi.org/10.1002/(sici)1099-1409(199707)1:3<251::aid-jpp24>3.0.co;2-p.

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Cobalt(III) tetraphenylporphyrin catalyses a hydride transfer reaction from tributyltin hydride to 10-methylacridinium ion via the formation of hydridocobalt(III) tetraphenylporphyrin, which is the rate-determining step, followed by facile hydride transfer from the hydridocobalt(III) porphyrin to 10-methylacridinium ion in acetonitrile. Tributyltin hydride is also effective for the hydrometallation of alkenes and alkynes with cobalt(III) tetraphenylporphyrin to yield the corresponding organocobalt(III) porphyrins regioselectively. The hydrometallation is suggested to proceed via the hydride transfer from tributyltin hydride to cobalt(III) tetraphenylporphyrin to give the hydridocobalt(III) porphyrin, followed by the hydrogen transfer from hydridocobalt(III) porphyrin to alkenes and alkynes to yield the corresponding organocobalt(III) porphyrins. The regioselectivities are consistent with the stabilities of radicals generated by the hydrogen transfer from hydridocobalt(III) porphyrin to alkenes and alkynes. The rates of the electrophilic cleavage of cobalt-carbon bonds of organocobalt(III) porphyrins by trifluoroacetic acid in MeCN are also reported.

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9

Tassano, Erika, and Mélanie Hall. "Enzymatic self-sufficient hydride transfer processes." Chemical Society Reviews 48, no. 23 (2019): 5596–615. http://dx.doi.org/10.1039/c8cs00903a.

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Enzymatic self-sufficient hydride transfer processes. The hydride shuttle used in catalytic quantities is typically a nicotinamide cofactor (full: reduced; empty: oxidized). Ideally, no electron is lost to ‘the outside’ and no waste is produced.

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10

Casey, Charles P., and Jeffrey B. Johnson. "Kinetic isotope effect evidence for the concerted transfer of hydride and proton from hydroxycyclopentadienyl ruthenium hydride in solvents of different polarities and hydrogen bonding ability." Canadian Journal of Chemistry 83, no. 9 (2005): 1339–46. http://dx.doi.org/10.1139/v05-140.

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The tolyl analogue of Shvo's hydroxycyclopentadienyl ruthenium hydride (4) efficiently transfers a hydride and proton to benzaldehyde or acetophenone to produce an alcohol. This reduction can be performed in toluene, methylene chloride, and THF. Reduction of benzaldehyde in toluene and methylene chloride occurs approximately 300 times faster than in THF at 0 °C. Reduction of acetophenone occurs between 75 and 150 times slower than benzaldehyde at 0 °C in each respective solvent. Despite the differences in rate, mechanistic studies have provided evidence for a similar concerted transfer of acidic and hydridic hydrogens in each solvent. Addition of water to THF led to further rate decrease coupled with an increase in the OH/D kinetic isotope effect and a decrease in the RuH/D kinetic isotope effect. Addition of excess alcohol to toluene or methylene chloride results in the significant retardation of the rate of reduction. The slower rate in THF and in the presence of alcohol is attributed to the stabilization of the ground state of ruthenium hydride 4 by hydrogen bonding and the additional energy required to break these bonds prior to carbonyl reduction.Key words: ruthenium hydrogenation catalysis, hydrogenation mechanism, kinetic isotope effects, ligandmetal bifunctional catalysis.

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