An electron spin resonance study of alkyl radical addition to diethyl vinylphosphonate
作者:Jehan A. Baban、Brian P. Roberts
DOI:10.1039/p29810000161
日期:——
The irreversible addition of alkyl radicals to diethyl vinylphosphonate to give the α-phosphorylalkyl radicals (1) has been studied by e.s.r. spectroscopy at 233 K in hydrocarbon solvents. The rate constants for addition (kadd) have R·+ H2CCHP(O)(OEt)2 [graphic omitted] RCH2ĊHP(O)(OEt)2(1) been determined relative to those (2kAt) for self-reaction of (1) for a series of addenda. The values of 2kAt
已在烃溶剂中于233 K下通过电离能谱研究了将烷基不可逆地加成到乙烯基膦酸二乙酯上以生成α-磷酰基烷基(1)。速率常数的加法(ķ加载)具有R·+ H 2 Ç CHP(O)(OET)2 [图形省略] RCH 2 CHP(O)(OET)2相对确定的(1)到过的那些(2 ķ甲t)(1)对于一系列附加物的自反应。2 k A t的值已在(1; R = Me)(2.0×10 9 dm 3 mol –1 s )的单独的动力学esr实验中测量。–1)和(1; R = Bu t)(5.0×10 8 dm 3 mol –1 s –1),因此获得了k add的绝对值。速率常数ķ附加沿该系列R增大·=我·(2.5×10 3分米3摩尔-1小号-1)