elemental tellurium efficiently inserts into Sn−Sn and Pb−Pb bonds under mild conditions to give the corresponding tellurides R3MTeMR3 (M = Sn, Pb) in quantitative yield. Mechanistic study shows that first a phosphine telluride R‘3PTe is formed via the reaction of R‘3P with tellurium, which subsequently reacts with (R3M)2 to produce (R3M)2Te and concomitantly regenerates R‘3P to restart another cycle
在催化量的膦存在下,元素
碲在温和条件下有效地插入Sn-Sn和Pb-Pb键中,从而以定量收率得到相应的
碲化物R 3
MTeMR 3(M = Sn,Pb)。机理的研究表明,第一膦
碲化物R“ 3 P经由R的反应形成的TE” 3 P与
碲,其随后发生反应以(R 3 M)2,以产生(R 3 M)2 Te和伴随再生R” 3 P重新开始催化插入的另一个循环。