Two new 3D networks Co(II) complexes constructed via the bridging dicyanamide and 2,2′-bipyrimidine ligands:: Structures and magnetic properties

被引：1
作者：
Chen, Chiu-Wang
Wei, Ho-Hsiang [1 ]
Lee, Chin-Jhan
机构：
[1] Tamkang Univ, Dept Chem, Tamsui 25137, Taiwan
[2] Ching Kuo Inst Management & Hlth, Chilung 203, Taiwan
来源：
JOURNAL OF THE CHINESE CHEMICAL SOCIETY | 2006年 / 53卷 / 06期
关键词：
cobalt(II) complexes; dicyanamide/2,2 '-bipyrimidine bridges; X-ray crystal structure; 3-D networks; magnetic properties;
D O I：
10.1002/jccs.200600172
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Two new complexes [Co(bipym)(dca)](dca) (1) and [Co(bipym)(dca)](2)(ClO4)(2) (CH3OH).2H(2)O (2) (dca = dicyanamide, bipym = 2,2'-bipyrimidine) have been synthesized and their structuresl magnetically characterized. Complex 1 crystallizes in a monoclinic system P2(1)/n space group, Z = 4, with a = 9.3710(2), b = 15.0690(3), c = 9.8920(2) angstrom, beta = 92.4780(10)degrees. Complex 2 crystallizes in a monoclinic system C2/c space group, Z = 4, with a = 16.4190(3), b = 17.0880(3), c = 12.1130(2) angstrom, and beta = 95.1070 (10)degrees. The crystal structure in 1 and 2 is a three-dimensional network contraction through the bridging 1,5-dca and bipym ligands. Temperature dependence of magnetic measurements show antiferromagnetic couplings in all cases with J = -7.22 for 1, and -7.11 cm(-1) for 2, respectively.
引用
收藏
页码：1291 / 1296
页数：6
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