evidence that the intermediate is productive. The reaction of 1 with 2-arylacetonitriles yields two noninterconvertible complexes: a cyclometalated species (4), analogous to complex 2, and the new olefinic species Cp2Zr(μ-N-tBu)(μ-N-CHCH(R)IrCp* (R = C6H5 (5a), R = (p-CF3)C6H4 (5b), R = (p-MeO)C6H4 (5c)). The reaction pathways for the formation of both 4 and 5 proceed through the fulvene complex 3; however
Cp 2 Zr(μ-N- t的反应具有腈(RC⋮N)的Bu)IrCp *(1)产生环化
金属物种Cp 2 Zr(μ-N- t卜)(μ-NC(H)(R)CH 2 -η 5 -C 5我4)IR(R = C 6 H ^ 5(图2a),Ô -Et-C 6 H ^ 4(图2b),(p - CH 3)C 6 H 4(2c),(p -CF 3)C 6 H 4(2d),(p -MeO)C 6 H 4(2e),环丙基(2f),CH(Me)2(2g),NC(CH 2)3(2h))。在1与
氰基
环丙烷的反应中观察到中间体。该中间体已通过NMR光谱表征为具有桥联亚烷基-酰胺基部分Cp 2 Zr(μ-N- t卜)(μ-NCRH)(η 5 -C 5我4 CH 2)IR(R =环丙基; 3)。进行了动力学模拟,并提供了中间体有效的证据。的反应1环
金属物种(:用2- arylacetonitriles产生两个noninter