Synthesis and Spectroscopic Characterisation of a New Class of Heterobimetallic Homoleptic Diethanolaminate Complexes of Niobium(V) and Tantalum(V)

Abstract

Nine heterobimetallic homoleptic diethanolaminate complexes of the types: [Nb(Rdea)3{Ta(Rdea)2}] (where Rdea = RN(CH2CH2O-)2 and R = H, 2; Me, 3; Bu n, 4; Ph, 5), [Nb(Rdea)3{Al(Rdea)}] (R = H, 6; Me, 7; Bu n, 8; Ph, 9), and [Nb(Phdea)3{Sb(Phdea)}] 10 have been prepared for the first time by the equimolar reactions of [Nb(Rdea)2(RdeaH)] with [Ta(Rdea)2(OPr i)] or [Al(Rdea)(OPr i)] or [Sb(Phdea)(OPr i)] in benzene. The structural features of the new complexes have been elucidated by IR and NMR (1H, 27Al) spectroscopies.