Ion–molecule reactions in acetylene and acetylene–methane mixtures

1968 ◽  
Vol 46 (10) ◽  
pp. 1755-1762 ◽  
Author(s):  
J. J. Myher ◽  
A. G. Harrison
Keyword(s):  
Excited States ◽  
Hydrogen Transfer ◽  
Transfer Reactions ◽  
Condensation Reactions ◽  
Ion Molecule Reactions ◽  
Hydrogen Transfer Reactions

The ion–molecule reactions in acetylene have been studied. The reaction of C2H2+ with C2H2 yields C4H2+ and C4H3+ in the ratio 0.40:1. C2H+ ions also react to form C4H2+. Excited states of C2H2+ and possibly C2H+ are shown to be important in the ion–molecule reactions in acetylene.In acetylene–methane mixtures the following reactions have been identified and their rates measured.[Formula: see text]By studying the reactions in CH4–C2D2 mixtures the condensation reactions have been shown to involve extensive isotopic scrambling while the hydrogen-transfer reactions occur without isotopic scrambling.

scholarly journals Hydrogen Transfer Reactions of Carbonyls, Alkynes, and Alkenes with Noble Metals in the Presence of Alcohols/Ethers and Amines as Hydrogen Donors

Catalysts ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 671 ◽  
Author(s):  
Eszter Baráth
Keyword(s):  
Condensed Phase ◽  
Crucial Role ◽  
Noble Metals ◽  
Hydrogen Transfer ◽  
Transfer Reactions ◽  
Hydrogen Donors ◽  
Stereoselective Reactions ◽  
Present Summary ◽  
Industrial Relevance ◽  
Hydrogen Transfer Reactions

Hydrogen transfer reactions have exceptional importance, due to their applicability in numerous synthetic pathways, with academic as well as industrial relevance. The most important transformations are, e.g., reduction, ring-closing, stereoselective reactions, and the synthesis of heterocycles. The present review provides insights into the hydrogen transfer reactions in the condensed phase in the presence of noble metals (Rh, Ru, Pd) as catalysts. Since the H-donor molecules (such as alcohols/ethers and amines (1°, 2°, 3°)) and the acceptor molecules (alkenes (C=C), alkynes (C≡C), and carbonyl (C=O) compounds) play a crucial role from mechanistic viewpoints, the present summary points out the key mechanistic differences with the interpretation of current contributions and the corresponding historical achievements as well.

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