Aurolysis of α-C-deprotonated group 6 aminocarbene and thiocarbene complexes with Ph<sub>3</sub>PAu<sup>+</sup>
作者:Helgard G. Raubenheimer、Matthias W. Esterhuysen、Gernot Frenking、Alexey Y. Timoshkin、Catharine Esterhuysen、Ulrike E. I. Horvath
DOI:10.1039/b607613k
日期:——
aminocarbene complexes, (CO)5M=C(NR2)CH3 (M = Cr or W; R = Me or propyl), react with Ph3PAu+ by metal group substitution - (CO)5M for Ph3PAu+--and attachment of the extricated M(CO)5 to the deprotonated methyl group. (The products may also be seen as aminovinylgold compounds coordinated to M(CO)5 moieties.) DFT calculations at the B3LYP level of theory using model compounds indicate a clear preference
去质子化的Fischer型氨基碳烯配合物(CO)5M = C(NR2)CH3(M = Cr或W; R = Me或丙基),通过金属基团取代与Ph3PAu +反应-(CO)5M取代Ph3PAu +-并连接M(CO)5脱去质子化的甲基。(该产物还可以看作是与M(CO)5部分配位的氨基乙烯基金化合物。)使用模型化合物在B3LYP理论水平上进行DFT计算,表明中心单元C的金单元明显优先于配体[NMe2CCH2 ]-,而Cr(CO)5与N-配位相比具有7 kcal mol(-1)的C(乙烯基)配位偏好。在相关的硫代碳烯中,硫供体原子应该是羰基金属单元的优选连接点。后一种预测在实践中得到证实,在孤立的三种产品中,在与[Ph3PAuSPh] Cr(CO)5的混合晶体中包含Ph3PAu C(= CH2)SPh} Cr(CO)5时,恰好存在这种配位模式。混合晶体的后一种组分也已经独立于乙烯基化合物而制备。