Insertion reaction of acetone-d6 into the osmium-hydrogen bond of [OsHCl(CO)(P-iso-Pr3)2]: experimental evidence for the hydrogen-transfer mechanism from alcohols to ketones

1991 ◽  
Vol 30 (5) ◽  
pp. 1159-1160 ◽  
Author(s):  
Miguel A. Esteruelas ◽  
Cristina. Valero ◽  
Luis A. Oro ◽  
Uwe. Meyer ◽  
Helmut. Werner
Keyword(s):  
Hydrogen Bond ◽  
Experimental Evidence ◽  
Hydrogen Transfer ◽  
Transfer Mechanism ◽  
Insertion Reaction

Intermolecular OHN hydrogen bond with a proton moving in 3-methylpyridinium 2,6-dichloro-4-nitrophenolate

RSC Advances ◽  
2015 ◽  
Vol 5 (116) ◽  
pp. 95576-95584 ◽  
Author(s):  
Irena Majerz ◽  
Matthias J. Gutmann
Keyword(s):  
Hydrogen Bond ◽  
Proton Transfer ◽  
Transfer Mechanism ◽  
Temperature Dependent

Temperature-dependent changes in the strong OHN hydrogen bond in 3-methylpyridinium 2,6-dichloro-4-nitrophenolate are used to discuss the proton transfer mechanism.

Siliciumverbindungen mit starken intramolekularen sterischen Wechselwirkungen, V. Organosilylnitrite, -nitrate und verwandte Verbindungen / Silicon Compounds with Strong Intramolecular Steric Interactions, V. Organosilicon Nitrites, Nitrates and Related Compounds

1976 ◽  
Vol 31 (9) ◽  
pp. 1212-1215 ◽  
Author(s):  
Manfred Weidenbruch ◽  
Fateh Sabeti
Keyword(s):  
Hydrogen Bond ◽  
Sulfur Trioxide ◽  
Insertion Reaction ◽  
Steric Interactions ◽  
Silicon Compounds ◽  
Silver Salts ◽  
Related Compounds

The reaction of triisopropyl- or tricyclohexylhalosilanes with silver salts gives the corresponding silyl nitrites and silyl nitrates. The insertion reaction of sulfur trioxide or dichlorocarbene into the silicon hydrogen bond of triisopropylsilane and tricyclohexylsilane yields the sulfates and the dichloromethyl derivatives, respectively.

Binuclear O2 activation and hydrogen transfer mechanism for aerobic oxidation of alcohols

2020 ◽  
Vol 10 (7) ◽  
pp. 2183-2192
Author(s):  
Zhiyun Hu ◽  
Hongyu Ge ◽  
Xinzheng Yang
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Hydrogen Transfer ◽  
Aerobic Oxidation ◽  
Density Functional Theory Calculations ◽  
Transfer Mechanism ◽  
Functional Theory ◽  
O2 Activation ◽  
Oxidation Of Alcohols

Density functional theory calculations reveal a binuclear O2 activation and hydrogen transfer mechanism with spin-crossovers for aerobic oxidation of alcohols.

Microsolvation, hydrogen bond dynamics and excited state hydrogen atom transfer mechanism of 2′,4′-dihydroxychalcone

2020 ◽  
Vol 739 ◽  
pp. 137030
Author(s):  
Yelechakanahalli Lingaraju Ramu ◽  
Kandigowda Jagadeesha ◽  
Tavarekere Shivalingaswamy ◽  
Mariyappa Ramegowda
Keyword(s):  
Hydrogen Bond ◽  
Excited State ◽  
Hydrogen Atom ◽  
Hydrogen Atom Transfer ◽  
Transfer Mechanism ◽  
Atom Transfer ◽  
Hydrogen Bond Dynamics

The intramolecular hydrogen bond in some β-nitroalcohols. Chemistry of nitroalkanes. Part CXIX

1977 ◽  
Vol 55 (13) ◽  
pp. 2504-2509 ◽  
Author(s):  
E. Lipczyńska-Kochany ◽  
T. Urbański
Keyword(s):  
Hydrogen Bond ◽  
Experimental Evidence ◽  
Intramolecular Hydrogen Bond ◽  
Infrared Absorption ◽  
Nmr Spectra ◽  
Absorption Bands ◽  
Intramolecular Hydrogen ◽  
Infrared Absorption Bands

New experimental evidence is given on the existence of an intramolecular hydrogen bond in β-nitroalcohols between the nitro and hydroxylic groups. The conclusion is based on examination of na → π* and infrared absorption bands and nmr spectra.

Isotope analysis for understanding the hydrogen transfer mechanism in direct liquefaction of Bulianta coal

Fuel ◽  
2017 ◽  
Vol 203 ◽  
pp. 82-89 ◽  
Author(s):  
Ben Niu ◽  
Lijun Jin ◽  
Yang Li ◽  
Zhiwei Shi ◽  
Haoquan Hu
Keyword(s):  
Hydrogen Transfer ◽  
Isotope Analysis ◽  
Transfer Mechanism ◽  
Direct Liquefaction

Thermal rearrangement of α,β- to β,γ-unsaturated esters. Evidence for a 1,5-hydrogen transfer mechanism

1968 ◽  
Vol 46 (13) ◽  
pp. 2225-2232 ◽  
Author(s):  
Donald E. McGreer ◽  
Norman W. K. Chiu
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Hydrogen Transfer ◽  
Activation Parameters ◽  
Transfer Mechanism ◽  
Thermal Rearrangement ◽  
Kcal Mole ◽  
Isopropyl Group ◽  
First Order ◽  
Group A ◽  
Entropy Of Activation

Methyl cis-4-methyl-2-pentenoate (1) has been found to rearrange at 252 °C by a simple first-order and presumably unimolecular mechanism to methyl 4-methyl-3-pentenoate (3) with a rate constant k of 4.28 × 10−5 s−1. The heat of activation ΔH†, was determined to be 37.5 ± 2 kcal/mole and the entropy of activation, ΔS†, was determined to be −8.2 ± 4 e.u. These activation parameters and the steric requirements of the reaction support a mechanism involving a cyclic 1,5-transfer of hydrogen. Studies on the isomerization of methyl cis-2-pentenoate, methyl cis-2,4-dimethyl-2-pentenoate, and methyl cis-2-methyl-2-pentenoate to the corresponding 3-pentenoates suggest that the 1,5-hydrogen transfer mechanism could well be general for the equilibration of α,β- and β,γ-unsaturated esters.An isopropyl group cis to a methyl or a carbomethoxy group on a double bond is shown by nuclear magnetic resonance to prefer a conformation with the methyls of the isopropyl group held away from the methyl or carbomethoxy group. A cis hydrogen does not restrict the conformation of the isopropyl group.

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