Syntheses, crystal structures and magnetic properties of two cyanide-bridged molecular squares M2II-Co2II (M = Ru, Os) based on the diamagnetic cyanidometal M(dppm)2(CN)2

被引：6

作者：

Wang, Yong ^{[1
,2
]}

Ma, Xiao ^{[1
]}

Hu, Shengmin ^{[1
]}

Wang, Yanlong ^{[1
,2
]}

Tan, Chunhong ^{[1
]}

Wen, Yuehong ^{[1
]}

Zhang, Xudong ^{[1
]}

Sheng, Tianlu ^{[1
]}

Wu, Xintao ^{[1
]}

机构：

[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

来源：

POLYHEDRON | 2014年 / 83卷

基金：

美国国家科学基金会;

关键词：

Diamagnetic cyanidometal bridge; Spin-canted; Os(II); Ru(II); Cobalt(II); INDUCED SPIN TRANSITION; COORDINATION POLYMERS; CHARGE-TRANSFER; BUILDING-BLOCK; BIMETALLIC COMPOUNDS; COMPLEXES SYNTHESIS; ELECTRON-TRANSFER; 1D CHAIN; M-II; FE;

D O I：

10.1016/j.poly.2014.05.041

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Two tetra-nuclear cyanide-bridged molecular square complexes [M-II(dppm)(2)(CN)(2)((CoCl2)-Cl-II)](2) (M = Ru, 1; M = Os, 2) (dppm = bis(diphenylphosphino) methane) were synthesized and characterized by elemental analysis, IR, electronic absorption spectra and single-crystal X-ray diffraction analysis. Both the isostructure complexes 1 and 2 crystallize in monoclinic space group P21/c, and possess two cis-M(dppm)(2)(CN)(2) (M = Ru, 1; M = Os, 2) and two CoCl2 units through cyanido bridges. What's more, the environment around the Co(II) atoms in 1 and 2 define a slightly distorted tetrahedron, and are coordinated by two nitrogen atoms from the cyanide groups with cis-configuration and by two chlorine atoms. Temperature dependence of magnetic susceptibilities show both 1 and 2 are weak antiferromagnetic coupling between the paramagnetic Co(II) ions across a diamagnetic cyanidometal -NC-M(II)-CN- bridge. Furthermore, complex 1 exhibits spin-canted behavior. However, there is no such magnetic behavior in complex 2, which may result from the more diffuse nature of the 5d orbits with respect to 4d. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：137 / 142

页数：6

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