Keggin unit supported transition metal complexes: hydrothermal synthesis and characterization of [Ni(2,2′-bipy)3]1.5[PW12O40Ni(2,2′-bipy)2(H2O)]·0.5H2O and [Co(1,10′-phen)3]1.5[PMo12O40Co(1,10′-phen)2(H2O)]·0.5H2O

Two new Keggin unit supported transition metal complexes, [Ni(2,2′-bipy)3]1.5[PW12O40Ni(2,2′-bipy)2(H2O)]·0.5H2O 1 and [Co(1,10′-phen)3]1.5[PMo12O40Co(1,10′,-phen)2- (H2O)]·0.5H2O 2, are synthesized by a hydrothermal method; complex 1 is characterized by X-ray crystallography, showing that the [Ni(2,2′-bipy)2(H2O)]2+ units are covalently bonded to the α-Keggin cluster [PWV2- WVI10O40]5.