Synthesis and physicochemical properties of d- and f-metal complexes with alloxan

Fifteen d- and f-metal complexes with alloxan were synthesized. Complexes of two types, in which alloxan exists in mono- or diinozed form, were found to be formed, depending on the synthesis conditions (solvents and pH of solutions). Physicochemical properties of alloxanates were studied by IR, X-ray photo electron, and electronic absorption spectroscopies. The alloxan molecule was calculated using the PPP method. The structures of complexes synthesized were suggested.