Decavanadate ion as bridging ligand. Synthesis and crystal structure of (NH4)2[Cu2(NH3CH2CH2COO)4(V10O28)] · 10H2O

A new polymeric inorganic–organic hybrid compound, (NH4)2[Cu2(NH3CH2CH2COO)4(V10O28)] · 10H2O, (1) has been synthesized and characterized by IR, electron and EPR spectroscopy. The thermal decomposition of 1 is briefly described. The structure of 1 consists of image moieties which are connected by bridging image ions into polymeric chain. The charge of polymeric chain is neutralized by ammonium cations. The complex 1 is so far the second known compound in which a decavanadate ion (HxV10O28(6−x)−) behaves as ligand. The bonding of image ion to the transition metal complex via end-bonded oxygen atom represents a coordination mode, not yet observed.