Amide complexes of thorium(IV) and uranium(IV) carboxylates

Abstract

Thorium(IV) and uranium(IV) carboxylates M(O₂CR)₄(R = Buⁿ, Me₂CHCH₂, Me₃C, CHCl₂, and CH₂Cl) and U(O₂CCCl₃)₄ have been prepared: the investigation of the behaviour of these, and other carboxylates, with amides as ligands has led to the isolation of complexes of the types M(O₂CR)₄·xL [x= 3, M = Th, L = MeCONMe₂(dpa), R = CF₃ or CCl₃ and M = U, R = CCl₃; x= 1, M = Th, L = dma, R = CHCl₂ or CH₂Cl, and L = MeCONPh₂(dpa), R = CHCl₂: x= 0.5, M = U, L = dma, R = CH₃Cl] and [M(O₂CR)₃L]₂O [M = Th or U, L = Me₃CCONMe₂(dmpa), R = CF₃, CCl₃, or CHCl₂: M = U, L = dma, R = CF₃ or CHCl₂, and L = dpa, R = CHCl₂]. The infrared and Raman spectra of these compounds are discussed.