The phosphinoenolate complex 4, which is prepared stepwise from [(mes)RuCl2]2 1 via the neutral and cationic compounds 2 and 3 as isolated intermediates, rearranges slowly in benzene to the thermodynamically more stable phosphinomethanide isomer 5; the presence of a three-membered RuCP ring in the latter is confirmed by X-ray crystallography.
磷醇酸盐复合物4是通过中性和阳离子化合物2和3作为已分离的中间体,逐步从[(mes)RuCl2]2 1制备而成。在苯中,它缓慢重排为热力学上更稳定的
磷甲烯异构体5;后者中存在的三元
铑-碳-
磷环通过X射线晶体学得到了证实。