Laser Flash Photolysis Studies of Alkoxyl Radical Kinetics Using 4-Nitrobenzenesulfenate Esters as Radical Precursors
作者:John H. Horner、Seung-Yong Choi、Martin Newcomb
DOI:10.1021/ol006469g
日期:2000.10.1
4-Nitrobenzenesulfenate esters were used as precursors for the generation of alkoxyl radicals under laserflashphotolysis conditions. The esters were efficiently cleaved using the Nd:YAG third harmonic (355 nm) to produce alkoxyl radicals and the 4-nitrobenzenethiyl radical. Rate constants for beta-scission and 1, 5-hydrogen abstraction reactions of alkoxyl radicals were measured.
<i>p</i>-Nitrobenzenesulfenate Esters as Precursors for Laser Flash Photolysis Studies of Alkyl Radicals
作者:Martin Newcomb、Pierre Daublain、John H. Horner
DOI:10.1021/jo026218g
日期:2002.11.1
laser flash photolysis (LFP) studies to generate alkoxyl radicals that fragmented to give the (2,2-diphenylcyclopropyl)methyl radical. Rate constants for the beta-scission reactions increased as a function of the carbonyl compound produced in the fragmentation reaction in the order CH2O < MeCHO < Me2CO < PhCHO < Ph2CO and increased with increasing solvent polarity. For alkoxyl radicals that fragment