A spectroscopic investigation of some five-co-ordinate adducts of aluminium hydride with tetramethylmethylenediamine and tetramethylpropanediamine

Abstract

Investigation of NNN′N′-tetramethylmethylenediamine–aluminium hydride, (Me₂N)₂CH₂,AlH₃, by vibration spectroscopy, n.m.r., and mass spectroscopy has shown that the adduct is unstable at room temperature in both the gas and solid phases. A reaction scheme for the decomposition is presented. The pure adduct has been characterised by its i.r. spectrum and evidence is presented for the structure of the adduct and for that of NNN′N′-tetramethylpropanediamine–aluminium hydride, (Me₂NCH₂)₂CH₂,AlH₃.