Tetraoxomolybdato and tetraoxotungstato complexes of iron(II) diimines

Abstract

The interaction of tetraoxomolybdate or tetraoxo ngstate with iron(II) diimines gives compounds of the type(LFeO₂MO₂) (L = 2,2'-bipy, 1, 10-phen; M = Mo or W. The magnetic studies suggest the presence of high spin iron (II) in the complexes. The IR spectral studies indicate the bonding of diimine to iron(II) and the bidentate nature of MO₄^2- group ligated to iron(II). Thermal decomposition behaviour of the complexes is reported. Iron(II) and molybdenum(VI) or tungsten(VI) are bridged by dioxo groups completing tetrahedral geometry.