Hydrothermal synthesis and crystal structure of a novel three-dimensional supramolecular network containing cyclic water hexamers: [Co(en)(3)](4)[P2Mo5O23](2)center dot 9H(2)O(en = ethylenediamine)

摘要

A new compound, [Co(en)(3)](4)[P2Mo5O23](2)center dot 9H(2)O, has been prepared under mild hydrothermal conditions and structurally characterized by elemental analyses, IR spectrum, and single-crystal X-ray diffraction. Yellow crystals crystallized in the triclinic space group P (1) over bar with a= 10.303(2) angstrom, b = 11.871(2) angstrom, c = 20.288(4) angstrom, alpha = 99.46(3)degrees, beta = 96.39(3)degrees, gamma = 115.32(3)degrees, V= 2165.9(8) angstrom(3), Z= 1 and R = 0.0566. The compound consists of diphosphopentamolybdate clusters, [Co(en)(3)](3+) complexes, and water molecules, which are held together to generate a three-dimensional supramolecular network via hydrogen-bonding interaction. Interestingly, the three-dimensional supramolecular network contains cyclic water hexamers, which play an important role in the formation of the crystal. (c) 2005 Elsevier B.V. All rights reserved.