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The crystal structure and variable temperature magnetic susceptibility of [(dien)Cu(H_2O)(μ-im)Co(NH_3)_4(μ-im) (H_2O)Cu(dien](NO_3)_5~1) 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 NO_3-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.
The crystal structure and variable temperature magnetic susceptibility of [(dien) Cu (H 2 O) (μ-im) Co (NH 3) 4 (μ-im) (H 2 O) Cu (dien] The complex crystallizes in the monelonic system. 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 and Cu (Ⅱ) atoms are of distorted square pyramid configuration. Cations are connected by hydrogen bond through rhodium NO_3-anions forming infinite chains. Fit to magnetic susceptibility data for powder sample overtemperature range 1.8-300 K shows that there is a weak antiferromagnetic exchange interaction between Cu (Ⅱ) ions in cation. The exchange mechanism has been discussed.