Zircona-phosphazine complexes: synthesis and X-ray determination

被引：9
作者：
Cadierno, V
Zablocka, M
Donnadieu, B
Igau, A
Majoral, JP
机构：
[1] CNRS, Chim Coordinat Lab, F-31077 Toulouse, France
[2] Polish Acad Sci, Ctr Mol & Macromol Studies, PL-90362 Lodz, Poland
来源：
NEW JOURNAL OF CHEMISTRY | 2003年 / 27卷 / 04期
关键词：
D O I：
10.1039/b210773m
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Addition of diazoalkane derivatives RCH(N-2) [R = CO2Et (a), SiMe3 (b)] on a-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 sigma-bonds in zirconate complexes, which reveals a zwitterionic canonical form for 3a.
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页码：675 / 679
页数：5
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