Treatment of the bis-acetylide zirconocene complexes (RCp)2Zr(C[symbol: see text]C-SiMe3)2 (8a, R = CH3; 8b, R = tert-butyl) with HB(C6F5)2 results in the formation of the five-membered organometallic zirconacycloallenoid products (9a, 9b). Both were characterized by X-ray diffraction, and the special bonding features of 9a were studied by DFT calculation. The overall reaction was followed by NMR experiments
                                    用 HB(
C6F5)2 处理双
乙炔锆茂络合物 (RCp)2Zr(C[符号:见正文]C-SiMe3)2 (8a, R = 
CH3; 8b, R = 叔丁基) 导致形成五元有机
金属
氧化锆环烯化产物 (9a, 9b)。两者都通过X射线衍射表征,并通过DFT计算研究了9a的特殊键合特征。整个反应之后是在可变温度下的 NMR 实验。从 8a 开始,反应通过炔基抽象进行,得到两性离子 [(MeCp)2ZrC[符号:见正文]C-SiMe3]+[eta-ArF2B(H)C[符号:见正文]C-SiMe3]-中间体( 12a),其单晶在-30°C 下获得,用于通过 X 射线衍射表征,然后进行 1,1-
硼氢化/σ-
配体偶联序列,得到新的五元
氧化锆环烯丙基产物 9a。