节点文献
Pd(OAc)2与有机双膦在卤代烷中的反应机理
The Reaction Mechanism of Pd(OAc)2 with Phosphine in Alkylhalide
【Author】 Wei Feng-ping~* Yang fan Huang Yong-ren (Analytic center, East China Normal University, Shanghai 200062)
【机构】 华东师范大学分析测试中心; 华东师范大学化学系;
【摘要】 <正>我们曾用 Pd(OAc)2与 dppm(二(二苯基膦甲烷))在二氯甲烷中反应,合成了新配合物 PdCl2-[PPh2CHClPPh2],研究结果表明溶剂二氯甲烷参与了反应,dppm 在无强碱作用下也可去掉一个质子,采用电子顺磁共振—自旋捕获(EPR-ST)技术对此反应进行了研究,捕获到自由基中间体,提出了反应机理并对影响因素进行了初步的探讨,证实此类反应是自由基反应。有机双膦配体由于它们的立体效应、
【Abstract】 It was studied that the new reaction mechanism of Pd(OAc)2 with dppm,dppe and dppp in different alkylhalide solvent by EPR-ST and NMR methods.The used capturer in EPR-ST was PBN.The obtained experimental spectra were simulated.The reaction mechanism was given and discussed depending on the results of EPR and NMR and products.In these processes,the joining of Pd(OAc)2 made the activation energy lower.Some influence factors on the reaction were tentatively discussed.It was showed that 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.
- 【会议录名称】 第十一届全国波谱学学术会议论文摘要集
- 【会议名称】第十一届全国波谱学学术会议
- 【会议时间】2000-10
- 【会议地点】中国江苏南京
- 【分类号】O643.12
- 【主办单位】中国物理学会波谱专业委员会