Crystal structure of an organic-inorganic hybrid compound based on morpholinium cations and a beta-type Anderson polyanion

A new organic-inorganic hybrid compound, pentamorpholinium hexahydrogen hexamolybdoferrate(III) sulfate 3.5-hydrate, (C4H10NO)(5)[ Fe-III(OH)(6)Mo6O18]( SO4)center dot 3.5H(2)O, was obtained from an aqueous solution. The polyoxidomolybdate (POM) anion is of the Anderson beta-type with a central Fe-III ion. Three of five crystallographically independent morpholinium cations are disordered over two sets of sites. An intricate network of intermolecular N-H center dot center dot center dot O and O-H center dot center dot center dot O interactions between cations, POMs, sulfate anions and non-coordinating water molecules creates a three-dimensional network structure.