A bimetallic oxide network constructed from oxomolybdoarsonate clusters and copper(II)-tetrapyridylpyrazine building blocks

摘要

The hydrothermal reaction of Cu(CH3CO2)2- H2O, MoO3, tetrapyridylpyrazine (tpyprz), and 2-hydroxypropyl-1,3-diarsonic acid provided green crystals of the bimetallic oxide phase [{Cu2(tpyprz)(H2O)}Mo6O_(18)(H2O) {O3AsCH2CH(OH)CH2AsO3}]-5.5H2O (1-5.5H2O). The two-dimensional structure of 1-5.5H2O is constructed from {Mo6O_(18)(H2O)(O3AsR)2}_n~(4n-) chains linked through {Cu2(tpyprz)(H2O)}~(4+) rods into a network. The hexanuclear molybdate ring consists of a tetrad of edge-sharing {MoO6} octahedra that adopt the corner-sharing mode to a diad of face-sharing Mo octahedra. Crystal data for C27H_(37)As2Cu2Mo6N6O_(32.5): monoclinic P2_1/c, fw= 1818.18, a = 13.1304(9)A, b = 21.701(l)A, c=17.408(1)A, β = 100.046(1)°, V = 4884.2(6)A~3, Z = 4, Dcalc = 2.472 g cm~(-3), R1 = 0.0669.