【摘要】 在前文[1 ,2 ] 基础上 ,扩展了有机双膦系列 .应用电子自旋捕获技术 (EPR ST)研究了Pd(OAc) 2 与系列有机双膦dppm(二 (二苯基膦甲烷 ) )、dppe(二 (二苯基膦乙烷 ) )及dppp(二(二苯基膦丙烷 ) )在氯代烷中反应的反应机理 ,所用捕获剂为PBN ,得到EPR实验谱并进行了模拟 .提出了反应机理并进行了讨论 .并对影响反应的一些因素进行了探讨 .Pd(OAc) 2 在此反应中既是反应物又是引发剂 ,在反应中起分子诱导作用 .当Pd(OAc) 2 与非自由基物种有机双膦配体及氯代烷共存时 ,引发了自由基反应 .更多还原

【Abstract】 The new reaction mechanism of Pd(OAc)\-2 with dppm, dppe and dppp in different chlorinated alkane solvents was studied by EPR ST method. The used capturer was PBN. The obtained experimental spectra were simulated. The reaction mechanism is given and discussed. In these processes, the joining of Pd(OAc)\-2 made the activation energy lower. Some influence factors on the reaction are tentatively discussed. It was shown that the solvents were both reactant and solvents and Pd(OAc)\-2 was both reactant and initiator. It affected the reaction by its molecular induced action. When compounds that were not the source of free radical were put together, the free radical reaction happened. \;更多还原