Oxomolybdenum(III, IV and V) complexes of thiofunctional ligands

Abstract

Reaction of [MoO 2(acac) 2] with Li 2 N S 2 S ′ 2 (S is a thioether, S′ a thiophenolate function) yielded the compound Li 7(thf) 17{MoO} 8 · 10thf · hexane, where {MoO} 8 represents one [ Mo IV O ( N S 2 S ′ 2 ) ] 1, three [ Mo III O ( N S 2 S ′ 2 ) ] - ( 2, linked, via the oxo group, to [Li(thf) 3] +) and two [ Mo V O ( S ′ 2 ) 2 ] 2 2 - ( 3a, linked by two [Li(thf) 2] +).A mixed-valent variant of 3, [ { Mo IV O ( S ′ 2 ) } { Mo V O ( S ′ 2 ) } ] - ( 3b, with an additional[Li(thf) 3] + attached to S′), was also identified. The compounds model features pertinent to oxo-transferases containing the molybdopterin cofactor.