CoCl（CNPh）_2（PPh_3）-2的制备、结构和性质

The Preparation, Structure and Properties of Chlorobis (Triphenyl Phosphine) bis (Phenyl Isocyanide) Cobalt (Ⅰ) Complex

由ＣｏＣｌ（ＰＰｈ３）３与过量ＰｈＮＣＳ在苯溶液中的反应制备出一种流的Ｃｏ（Ｉ）的五配位配合物．根据红外，１Ｈ核磁共振、快原子轰击质谱、ｘ电子能谱及元素分析结果确定其分子式为ＣｏＣｌ（ＣＮＰｈ）２（ＰＰｈ３）２与类似的配合物比较，推断该配合物具有三角双锥结构，其中两个大体积的叔膦基成轴间配位．从ｄ－ｐ户反馈π键度讨论了ＩＲ及１ＨＮＭＲ．此外，也对该回合物的溶解性、热稳定性以及对Ｏ２的稳定性加以了描述．

A new five-coordinated Co (I) complex has been prepared from the reaction of CoCl (PPh3 )3 with excess PhNCS in benzene, involving sulfur abstraction from isothiocyanate. The information obtained from IR, 1H NMR, FAB--MS, X--ray electron spectra and elemental analyses serves well the formulation of CoCl (CNPh )2 (PPh3 )2.A trigonal bipyramidal structure with two bulky phosphines at the axial positions has been deduced by analogy with the known structures of analogous Co(Ⅰ) complexes. And the IR and 1H NMR spectra are discussed in terms of the dπ--pπ backbonding, also described are the properties such as solubility, thermal stability and insensitivity towards oxygen.