The unique alternation of conformationally different (‘chair’-‘saddle’) eight-membered metallocycles [Cd2S4P2] in the chains of cadmium dialkyldithiophosphates: 13C, 31P, 113Cd CP/MAS NMR and single-crystal X-ray diffraction studies
作者:Alexander V. Ivanov、Andrey V. Gerasimenko、Oleg N. Antzutkin、Willis Forsling
DOI:10.1016/j.ica.2004.11.054
日期:2005.6
(Dtph) cadmium(II) complexes were prepared and studied by means of heteronuclear 31 P, 113 Cd, 31 C CP/MAS NMR spectroscopy and single-crystal X-ray diffraction. Linear-chain polynuclear structures have been established for both cadmium(II) complexes, in which each pair of equivalent dithiophosphate groups, playing the same bridging structural function, asymmetrically links the neighbouring cadmium atoms
摘要通过异核31 P,113 Cd,31 C CP / MAS NMR光谱法和单晶X射线研究了O,O'-二丙基二硫代磷酸酯和O,O'-二丁基二硫代磷酸酯(Dtph)镉(II)配合物。衍射。已经为两个镉(II)配合物建立了线性链多核结构,其中每对等价的二硫代磷酸酯基团发挥相同的桥联结构功能,不对称地连接相邻的镉原子。合成镉(II)化合物的一项显着结构特征是通过聚合物链中两种构象不同的(“椅子”-“鞍”)八元环[Cd 2 S 4 P 2]交替定义的。因此,在31 P NMR和XRD数据中,桥接的二硫代磷酸酯配体成对出现结构不等式。Dtph配体和镉原子的结构状态均由31 P和113 Cd化学位移张量表征,它们分别显示出深刻的轴向对称和主要菱形特征。所有实验的31 P共振都分配给两个解析结构中的磷结构位点。