Synthesis and reactivity of tantalocene zwitterions stabilized by ground-state α-agostic interactions via reaction of B(C6F5)3 with Cp′2Ta(=CH2)(CH3) (Cp′ = C5H5, C5H4Me)

被引:20
作者
Cook, KS
Piers, WE
Rettig, SJ
McDonald, R
机构
[1] Univ Calgary, Dept Chem, Calgary, AB T2N 1N4, Canada
[2] Univ British Columbia, Vancouver, BC V6T 1Z1, Canada
[3] Univ Alberta, Edmonton, AB, Canada
关键词
D O I
10.1021/om000176+
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Zwitterionic tantalocene derivatives are formed when the perfluorophenyl-substituted borane B(C6F5)(3) is reacted with the tantalocene methyl methylidene complexes Cp'Ta-2(=CH2)(CH3) (Cp' = C5H5, C5H4Me). The products arise from borane attack of the methylidene ligand and are characterized by a strong, ground-state alpha-agostic interaction, and insertion. of tert-butyl isocyanide occurs exclusively into the agostic Ta-C bond, producing iminoacyl zwitterions.
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页码:2243 / 2245
页数:3
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