A new organic-inorganic hybrid material constructed from Keggin polyanion and transition metal complexes: [Co(2,2′-bipy)3]1.5[SiWVWVI 11O40Co(2,2′-bipy)2(H2O)] · 0.5H2O

A new organic-inorganic hybrid compound constructed from Keggin-type polyanion clusters and transition metal complexes, [Co(2,2′-bipy)3]1.5[SiWVWVI 11O40Co(2,2′-bipy)2(H2O)] · 0.5H2O (1), has been hydrothermally prepared and characterized by elemental analysis, IR, UV–Vis, TG-DTA and single crystal X-ray diffraction. Compound 1 crystallized in the monoclinic system, space group C2/c, a = 46.995(15), b = 14.487(5), c = 26.205(9)A, β = 90.000(0)°, V = 17841(10)A3, Z = 4. Compound 1 contains a [SiWVWVI 11O40Co(2,2′-bipy)2(H2O)]3− polyoxoanion in which [Co(2,2′-bipy)2(H2O)]2+ is covalently bonded to the α-Keggin-type heteropolyanion [SiWVWVI 11O40]5− via a terminal oxygen.