Substitution of the acetylacetonate ligands in [MO2(acac)2] (M=Moor W; acac=acetylacetonate) by 2-oxy-1- naphthaldehyde izonicotinoyl hydrazonate (NIH2-) or 3-methoxy-2-oxybenzaldehyde izonicotinoyl hydrazonate (VIH2-) gives rise to either zigzag chain polymers, [MO2(NIH)]n (1 and 2), square complexes [MO2(VIH)]4 (3 and 4), mononuclear complexes [MO2(VIH)(C2H5OH)] (5 and 6), to polyoxomolybdate hybrid compounds [{MoO2(HNIH)}2Mo6O19] (7) and [MoO2(HVIH)(H2O)]2Mo6O19 (8), depending on the reaction conditions.
