Dinuclear Five-Coordinate Copper(II) Complexes with Chelating Diphosphonic Acid Ligands: Hydrothermal Synthesis, Structure, and Thermal Properties

作者：Dehghanpour Saeed^*; Asadizadeh Saeedeh; Assoud Jalil

来源：Zeitschrift fur Anorganische und Allgemeine Chemie, 2012, 638(5): 861-867.

DOI：10.1002/zaac.201100495

• Diphosphonic acids
• Hydrothermal synthesis
• X-ray diffraction
• Thermal properties
• Copper

The synthesis of two new diphosphonic acid ligands,[ethane-1, 2-diylbis(azanediyl)]bis[(4-chlorophenyl)methylene]diphosphonic acid (L1P), [ethane-1, 2-diylbis(azanediyl)]bis[(4-bromophenyl)methylene]diphosphonic acid (L2P), and their corresponding copper complexes, Cu2(L1P)2 (1) and Cu2(L2P)2 (2) are described herein. Complex 2 was structurally characterized with X-ray single crystal diffraction. The structure of 2 consists of five-coordinatecopper(II) ions with a distorted square pyramidal arrangement doubly bridged by OPO from phosphonate groups. The CuCu distance is 4.7810(2) angstrom. The crystal packing is determined by interdinuclear hydrogen bonds, which lead to one-dimensional chains. The results of thermogravimetric investigations (TG-DTA), UV/Vis diffuse reflectance, infrared and (1H and 13C) NMR spectroscopy, as well as elemental analyses of compounds 1 and 2 are also presented.

• 出版日期2012-4