in the asymmetric unit (Z = 8). The osmium complexes do not display this strong preference for cis-triphenylphosphine ligands and Os(C2F4)(CO)2(PPh3)2 exists as two separate but interconvertible isomers in solution. One isomer has the same relative geometry as Ru(C2F4)(CO)2(PPh3)2. The other has trans-triphenylphosphine ligands. This temperature-dependent equilibrium has been studied by variable-temperature
的d 8种配合物,M(CO)(L)(PPH 3)3(M =
钌,
锇; L = CO,CNR; R = p -
甲苯基)和OSCL(NO)(PPH 3)3,所有形式简单与
四氟乙烯和
马来酸酐的1:1π加合物,总体配位几何形状取决于烯烃的相对吸电子性能和
金属片段的相对电子富集度。在所有
钌的
四氟乙烯配合物中,配合物的几何形状均包含顺式-三苯基
膦配体。Ru(C 2 F 4(CO)2(PPh 3)2的X射线晶体结构作为该结构类的示例提供。Ru(C 2 F 4)(CO)2(PPh 3)2在单斜空间群P 2 1 / a中结晶,其晶胞尺寸为a = 35.940(2),b = 10.655(7),c = 18.559( 6)Å和β= 93.21(3)°,两个晶体学分子独立地位于不对称单元中(Z = 8)。complex络合物对顺式三苯基
膦配体和OS(C 2 F 4)(CO)2(PPh 3)2在溶液中以两种独立但可