Homolytic reactions of diorganotellurium and diorganoditellurium compounds in solution; an EPR study
作者:William Bell、David J. Cole-Hamilton、Peter N. Culshaw、A.Ewan D. McQueen、D.V. Shenai-Khatkhate、John C. Walton、Janet E. Hails
DOI:10.1016/0022-328x(92)80094-e
日期:1992.6
di-t-butyl, diallyl, allyl methyl, and dibenzyl tellurium showed EPR spectra of t-butyl, allyl, allyl, and benzyl radicals respectively. Alkyl radicals were not detected directly on thermolysis in the range 300–370 K but, primary, secondary, and tertiary alkyl, benzyl and allyl telluriums gave spin adducts of the corresponding alkyl radical with nitrosodurene. Dimethyl tellurium was unreactive in the same
通过EPR光谱研究了二烷基碲和二烷基二碲在叔丁基苯溶剂中的热分解和光化学分解。光解时,二叔丁基,二烯丙基,烯丙基甲基和二苄基碲分别显示了叔丁基,烯丙基,烯丙基和苄基的EPR光谱。在300-370 K范围内,未通过热分解直接检测到烷基,但伯,仲和叔烷基,苄基和烯丙基碲使相应烷基与亚硝基磺脲发生自旋加成。二甲基碲在相同温度范围内不反应。在315 k中的二有机取代基telluriums的热分解的速率被认为是按以下顺序,由自旋加合物光谱的强度来判断:吨卜2碲〜吨BuTeMe>(烯丙基)2 Te〜烯丙基TeMe> s Bu 2 Te>(苄基)2 Te> i Pr 2 Te> Et 2 Te> Me 2 Te。对于二己基-5-烯基碲,结果与己基5-烯基和己基5-烯丙基基团的形成和环化相一致。在dipent -4- enyltellurium的情况下,结果表明,两者外型-和内戊烯telluryl自由基-