[Ru(PhCOO)(CO)2(PhCOOH)]2, the catalyst, indicates that the active catalytic species are mononuclear ruthenium complexes. A stoichiometric reaction modelled on the catalytic reaction was monitored by infrared spectroscopy and finally quenched with PPh3. The quenching products were identified as new mononuclear ruthenium complexes, and these identifications greatly facilitated understanding of the mechanism leading
已经发现,通过Ru 3(CO)12以及具有一般结构[Ru(RCOO)(CO)2(L)] 12的二聚
羧酸钌钌配合物可以催化向
炔烃中添加
羧酸。反应产生
乙烯基酯。发现对于酸和
炔烃都是通用的。在与苯基
乙炔的反应中也形成了重排的区域异构体
乙烯基酯。已经观察到
羧酸的立体特异性动力学控制的顺式加成至三键。不对称
炔烃的区域选择性很差。观察到相对于[Ru(PhCOO)(CO)2(PhCOOH)] 2的1/2反应阶数催化剂表示活性催化物质是单核
钌络合物。通过红外光谱法监测以催化反应为模型的
化学计量反应,最后用PPh 3淬灭。淬灭产物被鉴定为新的单核
钌配合物,并且这些鉴定极大地促进了对导致建议的催化循环的机理的理解。