Crystal Structure and Magnetic Properties of Complex(dien)Cu(H_2O)(μ-im)Co(NH_3)_4(μ-im)(H_2O)Cu(dien)(NO_3)_5

摘要

The crystal structure and variable temperature magnetic susceptibility of [（dien）Cu（H2O）（μ-im）Co（NH3）4（μ-im） （H2O）Cu（dien]（NO3）51） have been determined.The complex crystallizes in the mon-oelinic system.In the cation,the imidazolate ligands connect one Co（Ⅲ） and two Cu（Ⅱ） stoma,forming animidazolates-bridged heterotrinuclear complex.Co（Ⅲ） atom is of a regular octahedral configuration andCu（Ⅱ） atoms are of distorted square pyramid configuration.The cations are connected by hydrogen bondsthrough NO3-anions forming infinite chains.The fit to magnetic susceptibility data for powder sample overtemperature range 1.8-300 K shows that there is a weak antiferromagnetic exchange interaction betweenCu（Ⅱ） ions in cation.The exchange mechanism has been discussed.