Sandwich-type germanotungstates: structure and magnetic properties of the dimeric polyoxoanions [M4(H2O)2(GeW9O34)2]12 - (M = Mn2+, Cu2+, Zn2+, Cd2+).

摘要: The novel dimeric germanotungstates [M4(H2O)2(GeW9O34)2]12- (M = Mn2+, Cu2+, Zn2+, Cd2+) have been synthesized and characterized by IR spectroscopy, elemental analysis, magnetic measurements, 183W-NMR spectroscopy. X-ray single-crystal analyses were carried out on Na12[Mn4(H2O)2(GeW9O34)2]·38H2O (Na12-1), which crystallizes in the monoclinic system, space group P21/n, with a 13.0419(8) A, b 17.8422(10) c 21.1626(12) β 93.3120(10)°, Z 2; Na11Cs2[Cu4(H2O)2(GeW9O34)2]Cl·31H2O (Na11Cs-2) triclinic P1, 12.2338(17) 12.3833(17) 15.449(2) α 100.041(2)°, 97.034(2)°, γ 101.153(2)°, 1; Na12[Zn4(H2O)2(GeW9O34)2]·32H2O (Na12-3) 11.589(3) 12.811(3) 17.221(4) 97.828(6)°, 106.169(6)°, 112.113(5)°, Na12[Cd4(H2O)2(GeW9O34)2]·32.2H2O (Na12-4) also 11.692...