according to 1H and 13C NMR spectra a five-co-ordinate structure. The σ,σ-N,N′ chelate R-dim and η2-olefin ligands are in the trigonal plane of a trigonal bipyramidal array with the Cl and CO groupings residing in the axial positions, a geometry similar to that of recently reported [PtCl2(η2-styrene)(t-Bu-dim)]. The dynamic behaviour of [RhCl(CO)(η2-C2H4)(R-dim)] which involves rotation of the ethylene around
α-二
亚胺(RNCHCHNR缩写为R-dim)与[LL'Rh(μ-Cl)2RhLL'](LL'CO或PF3和LCO,L'η2-
C2H4 )产生各种性质取决于L的平衡混合物。[RhCl(CO)(η2- )(R-dim)]可以分离,根据1H和13C NMR光谱,其具有五坐标结构。σ,σ-N,N'螯合的R-dim和η2-烯烃
配体位于一个三角形的双锥体阵列的三角形平面中,其中Cl和CO基团位于轴向位置,其几何形状与最近报道的[PtCl2 (η2-
苯乙烯)(t-Bu-dim)]。研究了[RhCl(CO)(η2- )(R-dim)]的动力学行为,该行为涉及
乙烯绕Rhη2- 轴的旋转。这些配合物容易失去
乙烯,从而提供四坐标的[RhCl(CO)(R-dim)]。溶液中获得的五坐标[RhCl(CO)2(R-dim)]与游离R-dim,离子性[Rh(CO)2(R-dim)]处于平衡状态(在NMR时间尺度上较慢)。