Solid state coordination chemistry of polyoxomolybdate clusters: Hydrothermal synthesis and structures of [{Cu3II(4-pt)2(4-Hpt)2(H2O)2}{Mo8O26}] • 2H2O and [{Cu10I(4-pt)6(4-Hpt)2}{Mo8O26}] • 2H2O (Hpt=5(4′-pyridyl)tetrazole)

The hydrothermal reactions of MoO3, Cu(CH3CO2)(2) H2O and 5(4'-pyridyl)tetrazole (4-Hpt) yielded a low temperature Cu(II) phase [{Cu-3(4-pt)(2)(4-Hpt)(2)(H2O)(2)}{Mo8O26}] 2H(2)O (1 2H(2)O) and a high temperature Cu(I) material [{Cu-10(4-Pt)(6)(4-Hpt)(2)}{Mo8O26}] 2H(2)O (2 2H(2)O). The two-dimensional structure of I is constructed from beta-octamolybdate clusters embedded in a {Cu-3(4-pt)(2)(4-Hpt)(2)(H2O)(2)}(n)(4n center dot) network The copper(II)-pyridyltetrazolate layer consists of trinuclear clusters of corner-sharing copper '4 + 2' octahedra linked through the dipodal 4-pt ligands In contrast, the three-dimensional structure of 2 contains the {beta-Mo8O26}(4-) building block embedded in a three-dimensional {Cu-10(4-pt)(6)(4-Hpt)(2)}(n)(4n center dot) framework The copper(I)-pyridyltetrazolate substructure consists of chains Of Cu tetrahedra and trigonal planes bridged by tetrazolate groups and connected through exo-catenate {CuN2O} trigonal planar units bonding to the pyridyl nitrogens of the dipodal ligand. (C) 2010 Elsevier B.V All rights reserved