ChemInform Abstract: Radical Translocation Reactions of Vinyl Radicals: Substituent Effects on 1,5-Hydrogen-Transfer Reactions.

ChemInform ◽  
2010 ◽  
Vol 24 (46) ◽  
pp. no-no
Author(s):  
D. P. CURRAN ◽  
W. SHEN
Keyword(s):  
Hydrogen Transfer ◽  
Substituent Effects ◽  
Transfer Reactions ◽  
Vinyl Radicals ◽  
Hydrogen Transfer Reactions

Electrostatic effects on ionization equilibria: An MNDO study of proton and hydrogen transfer reactions of 4-fluorobutylamine

1990 ◽  
Vol 55 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Zdeněk Friedl ◽  
Stanislav Böhm
Keyword(s):  
Hydrogen Transfer ◽  
Substituent Effects ◽  
Radical Cations ◽  
Transfer Reactions ◽  
Protonated Forms ◽  
Minor Part ◽  
Bond Strengths ◽  
Ionization Equilibria ◽  
A Minor ◽  
Gas Phase Basicities

The relative enthalpies of proton transfer δ ΔH0and homolytic bond strengths δDH0(B-H+) were calculated by the MNDO method for the sp and ap conformers of 4-flurobutylamine. The data obtained, along with the experimental gas phase basicities, are compared with the values predicted by the electrostatic theory. It is shown that the substituent polar effects FD on the basicities of amines are predominantly due to interactions in their protonated forms (X-B-H+) and/or radical-cations (X-B+.), those in the neutral species (X-B) playing a minor part. A contribution, which is considerably more significant in the sp conformer than in the ap conformer, arises probably also from substituent effects on the homolytic bond strength DH0(B-H+.

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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