Trimeric methylaminogallane, (MeNHGaH2)3, and related compounds

Abstract

The novel compounds (MeNHGaH₂)_n and (MeNHGaD₂)_n have been prepared, and their physical and chemical properties investigated. They are trimeric in benzene solution, and ¹H n.m.r. studies show the presence of two isomers for the six-membered (Ga–N)₃ ring, which is considered to be in the chair conformation. Aminogallane, (H₂NGaH₂)_n, was formed as a polymeric material, insoluble in organic solvents. N.m.r. of the related organogallanes, (Me₂NGaMe₂)_n and (MeNHGaMe₂)_n, has been studied in an attempt to elucidate the factors which govern the degree of association of this type of Ga–N system. Similar reactions involving trimethylamine-alane, Me₃N,AlH₃, have been investigated, and a comparison is made between the compounds studied in this work and similar boron systems.