The i.r. spectra of tetrahedral [M(P2Me4S2)2]2+, pseudo-tetrahedral MX2·P2Me4S2, and cis-octahedral MX4·P2Me4S complexes of tetramethyl-1, 2-dithioxodi-λ5-phosphane (tetramethyldiphosphine disulphide), P2Me4S2(X = halide), are all consistent, in the region of the ligand skeletal stretching frequencies, with D2d or C2v symmetry for the complex species and with a planar cis-chelate configuration for
的四面体[M(P IR光谱2我4小号2)2 ] 2+,伪四面体MX 2 ·P 2我4小号2,和CIS -octahedral MX 4 ·P 2我4个第络合物四甲基-1- ,2- dithioxodi-λ 5 -膦(tetramethyldiphosphine二
硫化物),P 2我4小号2(X =卤化物),都是一致的,在该
配体的骨架振动频率的区域中,与d 2 d或c ^ 2v复杂物种的对称性,且配位的P 2 Me 4 S 2
配体具有平面顺式-螯合物构型。与包含(gauche-chelate)P 2 Me 4 S 2的(CuCl·P 2 Me 4 S 2) 2的光谱和与其中保留有
配体的(CuCl 2 ·P 2 Me 4 S 2) n的光谱进行比较。内部反式构象,表明反式
配体可以由不存在或P-P和对称p-S伸缩吸收的相对弱点来识别,但振动数据不能单独的可靠地区分的顺式-和笨拙螯合物结构。在[Co(P