A quantitative study of alkyl radical reactions by kinetic spectroscopy III. Absorption spectrum and rate constants of mutual interaction for the ethyl radical

1979 ◽  
Vol 11 (9) ◽  
pp. 995-1005 ◽  
Author(s):  
Hiroyuki Adachi ◽  
N. Basco ◽  
D. G. L. James
Keyword(s):  
Absorption Spectrum ◽  
Quantitative Study ◽  
Rate Constants ◽  
Alkyl Radical ◽  
Mutual Interaction ◽  
Radical Reactions ◽  
Kinetic Spectroscopy ◽  
Ethyl Radical

Kinetic Study of the Radical Azidation with Sulfonyl Azides

2013 ◽  
Vol 66 (3) ◽  
pp. 341 ◽  
Author(s):  
Karin Weidner ◽  
Philippe Renaud
Keyword(s):  
Hydrogen Atom ◽  
Kinetic Study ◽  
Rate Constants ◽  
Alkyl Radical ◽  
Hydrogen Atom Transfer ◽  
Radical Reactions ◽  
Atom Transfer ◽  
Sulfonyl Azides

Rate constants for the reaction between a secondary alkyl radical and two different sulfonyl azides were determined using bimolecular competing radical reactions. The rates of azidation were determined by competition with hydrogen atom transfer from tris(trimethylsilyl)silane ((TMS)3SiH) of the 4-phenylcyclohexyl radical. 3-Pyridinesulfonyl azide and trifluoromethanesulfonyl azide were found to have rate constants for azidation of 2 × 105 M–1 s–1 and 7 × 105 M–1 s–1 at 80°C, respectively.

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