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Two New 3D Networks Co(II) Complexes Constructed via the Bridging Dicyanamide and 2,2′‐Bipyrimidine Ligands: Structures and Magnetic Properties
Author(s) -
Chen ChiuWang,
Wei HoHsiang,
Lee ChinJhan
Publication year - 2006
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200600172
Subject(s) - dicyanamide , chemistry , monoclinic crystal system , antiferromagnetism , crystal structure , crystallography , bridging (networking) , stereochemistry , condensed matter physics , organic chemistry , physics , ionic liquid , catalysis , computer network , computer science
Two new complexes [Co(bipym)(dca)](dca) ( 1 ) and [Co(bipym)(dca)] 2 (ClO 4 ) 2 (CH 3 OH)·2H 2 O ( 2 ) (dca = dicyanamide, bipym = 2,2′‐bipyrimidine) have been synthesized and their structuresl magnetically characterized. Complex 1 crystallizes in amonoclinic system P 2 1 /n space group, Z = 4, with a = 9.3710(2), b = 15.0690(3), c = 9.8920(2) Å, β = 92.4780(10)°. Complex 2 crystallizes in a monoclinic system C 2/c space group, Z = 4, with a = 16.4190(3), b = 17.0880(3), c = 12.1130(2) Å, and β = 95.1070 (10)°. 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.