Mixed complexes of N,N′-ethylenebis(salicylideneiminato)uranium(IV)

Abstract

Some mixed N,N′-ethylenebis(salicylideneiminato), salen, complexes of uranium(IV) of formula U(salen)X₂(X = Cl, acetylacetonato, dipivaloylmethanato, N-methylsalicylideneiminato, dibenzoylmethanato) are reported. It is shown that U(salen)₂ and UCl₄ undergo a ligand redistribution reaction in tetrahydrofuran (THF) leading to U(salen)Cl₂,2THF. Chemical and mass spectrometric data are presented supporting the monomeric structure of the complexes of formula U(salen)(chelate)₂. Evidence is presented suggesting the transitory formation of the adduct U(salen)₂,UCl₄ in the course of the redistribution reaction leading to U(salen)Cl₂.