The preparation and characterization of the novel perhalogenated diazaphosphametalletidines, Cl3M[N(SiMe3)PCl2N(SiMe3)]·THF, M = Ti, Zr and Hf 2–4 and Cl4Nb[N(SiMe3)PCl2N(SiMe3)] 5 are reported. In addition, a new high yield preparation of the previously synthesized metallacycle Cl3Ti[N(SiMe3)PCl2N(SiMe3)] 1 is described. All reported complexes were synthesized by [3 + 1] cyclocondensation reactions involving the aminoiminophosphorane, (Me3Si)2NPCl2NSiMe3, and corresponding metal halides in dichloromethane. When 2.5 equivalents of (Me3Si)2NPCl2NSiMe3 were reacted with NbCl5
a complex series of products was identified by 31P1H} NMR spectroscopy; crystals of the unusual heterocycles [Cl3NbN(SiMe3)PCl2N}2Cl2NbN(SiMe3)PCl2N(SiMe3)}] 6 and [Cl2NbN(SiMe3)PCl2N(SiMe3)}]2-μ-Cl(NPCl2N) 7 were isolated. Complex 7 contains the first example of a ClNbNPNNb six-membered ring. Structural characterization by single-crystal X-ray diffraction is also reported for metallacycles 2, 3, and 5–7.
报告了新型全卤化重氮膦
甲脒 Cl3M[N(SiMe3)PCl2N(SiMe3)]-THF (M = Ti、Zr 和 Hf 2-4)和 Cl4Nb[N(SiMe3)PCl2N(SiMe3)] 5 的制备和表征。此外,还介绍了以前合成的
金属环 Cl3Ti[N(SiMe3)PCl2N(SiMe3)] 1 的一种新的高产率制备方法。所有报告的配合物都是通过
氨基亚
氨基
磷烷、(Me3Si)2NPCl2NSiMe3 和相应的
金属卤化物在
二氯甲烷中发生 [3 + 1] 环缩合反应合成的。当 2.5 个当量的 (Me3Si)2NPCl2NSiMe3 与 NbCl5 反应时,通过 31P1H} NMR 光谱鉴定出了一系列复杂的产物。通过 31P1H} NMR 光谱鉴定出了一系列复杂的产物;分离出了不同寻常的杂环 [Cl3NbN(SiMe3)PCl2N}2Cl2NbN(SiMe3)PCl2N(SiMe3)}] 6 和 [Cl2NbN(SiMe3)PCl2N(SiMe3)}]2-μ-Cl(NPCl2N) 7 的晶体。络合物 7 包含第一个 ClNbN
PNNb 六元环。此外,还报告了通过单晶 X 射线衍射对
金属环 2、3 和 5-7 进行的结构表征。