作者:Siegfried Voran、Herbert Blau、Wolfgang Malisch、Ulrich Schubert
DOI:10.1016/s0022-328x(00)87649-4
日期:1982.6
compounds M(CO)6 (M = Cr. Mo, W) with two equivalents Me3PCH2 yields the phosphonium acylmetalphosphorus ylides Me4P[(CO)5MC(O)CHPMe3] 1a–1c. Their reaction with Me3SiOSO2CF3 leads via O-silylation to formation of the neutral “siloxy(ylidecarbene) complexes” (CO)5MC(OSiMe3)CHPMe32a–2c, which are protonated by HX (X = Cl, CF3SO3) to give the thermolabile carbene complexes [(CO)5MC(OSiMe3)H2CPMe3]X
所述hexacarbonylmetal的治疗化合物M(CO)6(M =铬。沫,W)与2个当量我3 PCH 2个产量鏻acylmetalphosphorus叶立德我4 P [(CO)5 MC(O) CHPMe 3 ]图1A-1C。它们与我反应3 SiOSO 2 CF 3个通过O型甲硅烷基化导致形成中性的“甲硅烷氧基(ylidecarbene)配合物”(CO)5 MC(OSiMe 3)CHPMe 3 2a-2c中,其由质子化的HX(X = Cl,CF 3 SO 3)得到热不稳定的卡宾配合物[(CO)5MC(OSiMe 3)H 2 CPMe 3 ] X,3a,3b。1 H,13 C NMR和IR数据表明,在2a–2c的情况下,羧基电荷的离域到卡宾碳上会生成金属配位的乙烯基。此外,这一事实通过2c的X射线分析得到了证明,针对该结果发现C(ylide)C(carbene)的键距为133