The reaction of aluminium hydroborate with some ethers and amines, and with lithium hydride, deuteride, chloride, and hydroborate

Abstract

Aluminium hydroborate reacts with isopropyl ether and tetrahydrofuran forming simple 1 : 1 complexes. With methylamine a 1 : 2 complex, Al(BH₄)₃,2MeNH₂, is formed which is stable to 50°, while dimethylamine affords a 1 : 1 complex. The addition of excess of either of these amines results in hydrogen evolution, and both cleavage and degradation of the aluminium hydroborate occurs. The i.r. and n.m.r. spectroscopic properties of the complexes are reported, and a comparison is made of the reactivity of the ligands towards diborane and aluminium hydroborate. The interaction of aluminium hydroborate with anionic species (LiH, LiD, LiBH₄, and LiCl) is also discussed.