Cyclogallazanes. Part II. Effect of R group on ring size of (RNHGaH2)n compounds

Abstract

A series of novel, cyclic, volatile, N-alkylgallazanes (RNHGaH₂)_n(R = Et, Prⁿ, Prⁱ, Buⁿ, Buⁱ, Bu^s, or Bu^t), has been synthesised and characterised by analyses, molecular weight determinations, and i.r., ¹H n.m.r., and mass spectroscopic measurements. The effect of R group on ring size and conformational properties has been investigated. Normal alkyl groups lead to trimeric gallazanes whereas with branched-chained alkyl groups a preference for a dimeric structure has been demonstrated. Isopropyl gallazane and s-butyl gallazane are mobile liquids at room temperature and novel ¹H n.m.r. and i.r. spectra have been obtained on the neat liquids.