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A complex of copper perchlorate coordinated with imidazole Cu(CNH)(ClO) was synthesized and characterized by X-ray single-crystal diffraction. The complex is centrosymmetric in the monoclinic P2(1)/ c space group. The low-temperature molar heat capacities and thermodynamic properties of the complex were studied with adiabatic calorimetry (AC). The thermodynamic functions [ H - H ] and [ S - S ] were derived in the temperature range from 80 to 370 K with temperature interval of 5 K. Thermal decomposition behavior of the complex in nitrogen atmosphere was studied by thermogravimetric (TG) analysis and differential scanning calorimetry (DSC). The mechanism of the decomposition was deduced to be the breaking up the two Cl-O bonds of the Cl-O-Cu and the Cu-N bonds of the imidazole rings in succession. [ABSTRACT FROM AUTHOR]

A heptanuclear trigonal prismatic polyhedron, [EuCu(μ-OH)(Gly)Im](ClO)·3HO, was synthesized and characterized by elemental analysis and X-ray single-crystal diffraction. The complex crystallize is the rhombohedral R3 space group ( a = b = 15.8673 Å, c = 23.4038 Å, V = 5103.0(6) Å, Z = 3). In the clusters, Eu ions are situated in the center of a prism formed by six copper atoms and coordinate to nine oxygen atoms with a tricapped trigonal prismatic coordination polyhedron. Six glycinato ligands and six imidazole terminal ligands (each coordinates to one Cu) were used in the construction of the cluster. The low-temperature molar heat capacity, C, and thermodynamic properties of the complex were studied with an adiabatic calorimeter from 80 to 370 K. The thermodynamic functions [ H- H] and [ S- S] were derived in the temperature range from 80 to 370 K with a temperature interval of 5 K. The thermal properties of the complex from 300 to 800 K were studied by DSC and TG in nitrogen atmosphere. [ABSTRACT FROM AUTHOR]