Synthesis, characterization and crystal structure determination of aluminum hydride complexes of N, N′- Di(isopropyl)ethylenediamine ligand

Abstract

Abstract Reaction of alane-amine adduct, AlH3·NMe2Et, with N, N´-di(isopropyl)ethylenediamine was conducted for the preparation of amide ligated aluminum hydride complexes via dehydrocoupling pathway. Depending on the proportion of the reagents (1:1 and 3:2) two different products (1) and (2) were isolated. Compounds 1 and 2 were characterized using different spectroscopic techniques along with the determination of solid-state molecular structure via single crystal X-ray diffraction studies. In the crystal lattice of complex 2, molecules are connected via weak Al-H…H C hydrogen bonding supramolecular interactions to form polymeric arrangements of the molecule. Further, a reaction of 2 with two equivalents of 1, 2-diphenylethylene-glycol generated complex 3 that was isolated in trace quantities. Molecular structure of 3 was also determined using single crystal X-ray diffraction study.