Addition of diazoalkane derivatives RCH(N2) [R = CO2Et (a), SiMe3
(b)] on α-phosphino zirconocene complexes 1, 4 and 6 affords stable N-metal phosphazine compounds 3a,b, 5a,b and 7a,b, respectively. The single crystal X-ray structure of 3a is reported and shows an s-transoid
(E) geometry for the phosphazine substructure P1–N1–N2–C9 with a zirconium-to-nitrogen distance in the range of that of Cp2Zr–N σ-bonds in zirconate complexes, which reveals a zwitterionic canonical form for 3a.
将二氮烷衍
生物 RCH(N2) [R = CO2Et (a), SiMe3 (b)] 加入 α-
磷配体锆塞场复合物 1、4 和 6,得到稳定的 N-
金属
磷杂环化合物 3a,b、5a,b 和 7a,b。报道了 3a 的单晶 X 射线结构,显示
磷杂环子结构 P1–N1–N2–C9 的 s-transoid (E) 结构,与
锆到氮的距离处于 Cp2Zr–N σ 键在
锆酸盐复合物中的范围内,揭示了 3a 的双性离子经典形式。