Synthesis and Reactions of Cp*2Hf(η2-PhC2SiMe3) with Water and Carbon Dioxide

详细信息    查看全文

• 作者：Torsten Beweries ; Vladimir V. Burlakov ; Stephan Peitz ; Perdita Arndt ; Wolfgang Baumann ; Anke Spannenberg ; Uwe Rosenthal
• 刊名：Organometallics
• 出版年：2008
• 出版时间：August 11, 2008
• 年：2008
• 卷：27
• 期：15
• 页码：3954-3959
• 全文大小：163K
• 年卷期：v.27,no.15(August 11, 2008)
• ISSN：1520-6041

文摘

The complexation of phenyl(trimethylsilyl)acetylene by decamethylhafnocene gave the complex Cp^*₂Hf(η²-PhC₂SiMe₃) (1-Hf). By comparison of detailed spectroscopic and structural data as well as of some regioselective reactions of 1-Hf to the titanium analogue Cp^*₂Ti(η²-PhC₂SiMe₃) (1-Ti) and the zirconium complex Cp^*₂Zr(η²-PhC₂SiMe₃) (1-Zr) one can try to understand how the metals interact in these complexes with differently substituted acetylenic carbon atoms. All data for 1-Hf show an extremely strong interaction of the alkyne with hafnium compared to the analogous compounds of titanium and zirconium. Complex 1-Hf reacted with water at the Hf−C(Ph) bond to form the complex Cp^*₂Hf(OH)−C(SiMe₃)CHPh (2-Hf). With carbon dioxide, a mixture of regioisomeric hafnafuranones 4a/b-Hf was formed.