Unexpected Formation of the Vinyl−Phosphonio Complex [CpRu(PPh₃)(C₆H₄PPh₂CHCH₂)][PF₆] from a Vinylidene Complex via Nucleophilic Addition and Ortho Metalation of Triphenylphosphine

The reaction of Ru−vinylidene complexes with triphenylphosphine led to the formation of vinyl−phosphonio complexes in good yields. The results obtained by using a deuterium-labeled complex and a methyldiphenylphosphine analogue indicated that the present reaction proceeded via nucleophilic addition to the α-carbon of the vinylidene group, followed by ortho metalation of the phenyl ring on the cationic phosphorus atom.钌-亚乙烯基配合物（Ru−vinylidene complexes）与三苯基膦（triphenylphosphine）反应，可高产率制得乙烯基-𬭸配合物（vinyl−phosphonio complexes）。借助氘标记配合物与甲基二苯基膦类似物开展实验得到的结果显示，本反应的历程为：先对亚乙烯基基团的α-碳原子进行亲核加成，随后在阳离子磷原子所连接的苯环上发生邻位金属化。