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A new dinuclear complex of Cd(II) with N',N'(2)-bis[(1E)-1-(2-pyridyl)ethylidene]propanedihydrazide (H2L) was synthesized and its crystal structure determined. The basic structural unit of the complex is the binuclear [Cd-2(H2O)(2)(H2L)(2)](4+) cation, where each cadmium atom is heptacoordinated by two tridentate H2L ligands, by means of the NNO chelating system, and one water molecule. A 12-membered macrocycle is defined at the core of the binuclear cation. The complex showed a pronounced cytotoxic activity to murine melanoma B16 cells and human cervical cancer HeLa cells.

A new dinuclear complex of Cd(II) with N',N'(2)-bis[(1E)-1-(2-pyridyl)ethylidene]propanedihydrazide (H2L) was synthesized and its crystal structure determined. The basic structural unit of the complex is the binuclear [Cd-2(H2O)(2)(H2L)(2)](4+) cation, where each cadmium atom is heptacoordinated by two tridentate H2L ligands, by means of the NNO chelating system, and one water molecule. A 12-membered macrocycle is defined at the core of the binuclear cation. The complex showed a pronounced cytotoxic activity to murine melanoma B16 cells and human cervical cancer HeLa cells. (c) 2007 Elsevier B.V. All rights reserved.

A novel ligand 2,6-diacetylpyridine-bis(selenosemicarbazone) was synthesized and coordinated with Zn(II), Cd(II) and Ni(II). With Zn(II) and Cd(II), the bideprotonated ligand was coordinated as a quinquedentate in trigonal bipyramidal geometry. With Ni(II) during coordination the ligand was modified by elimination of hydrogen selenide and the product was coordinated as a quadridentate forming a square planar complex, the structure of which was determined by X-ray analysis. (C) 2006 Elsevier B.V. All rights reserved.