Bridged aminotroponiminate complexes of gallium and indium

Abstract

The reaction of the salt dipotassium 1,3-di[2-(isopropylamino)troponiminate]propane, K₂[(ⁱPr)TP], with MCl₃ (M = Ga, In) leads to complexes of composition [{(ⁱPr)TP}MCl] [M = Ga (1), In (2)]. The co-ordination polyhedron of 2 is best described in terms of a distorted chiral tetragonal pyramid in which the chlorine atom occupies the apex. The two seven-membered rings of the [(ⁱPr)TP]²⁻ ligand in 2 are twisted by about 19.9° with respect to each other. To study the reactivity of 2, the derivatives [{(ⁱPr)TP}InMe], [{(ⁱPr)TP}InCH₂SiMe₃], and [{(ⁱPr)TP}InO^tBu] were synthesised.