Studies of how redox chemistry influences the synthesis of transition metal phosphametallocenes: a convenient synthesis of 2,5-diester-substituted phosphametallocenes and 2,2′,5,5′-tetraester-substituted-1,1′-diphosphaferrocenes

Abstract

Convenient syntheses of 2,5-diester-substituted phosphametallocenes and 2,2′,5,5′-tetraester-substituted-1,1′-diphosphaferrocenes are described. Studies of the reactivity of alkali metal 3,4-dimethylphospholide, 2-ester-3,4-dimethyl phospholide and 2,5-diester-3,4-dimethylphospholide anions towards iron(II) centres (as [Fe(AlCl₄)₂] or [Fe(MeCN)₆(BF₄)₂]) indicate that the corresponding 1,1′-diphosphaferrocenes are obtained without any complications resulting from redox chemistry at the iron centre.