Abstract: | The reaction of ammonium heptamolybdate with hydrazine sulfate in an aqueous solution of glycine at room temperature yielded colorless crystals of (NH4)4(NH3CH2CO)2(Mo8O28)] · 2 H2O. The crystal is monoclinic, space group C2/c (no. 15), a = 17.234 Å, b = 10.6892 Å, c = 18.598 Å, β = 108.280°, V = 3253.2 Å3, Z = 4. The crystal structure contains ammonium cations and isolated octamolybdate(4–) anions, (NH3CH2CO)2(Mo8O28)]4–, with two zwitterionic glycine molecules as ligands. |