SYNTHESIS OF NEW AZIDOALANES WITH HETEROCYCLIC MOLECULAR STRUCTURES

Abstract

The synthesis of the tetrameric azidoalanes [(CFtyClAl^fo (1) and [(CH3)BrAlN3]4 (2) with heterocyclic cyclooctane-like structures has been demonstrated. X-ray structural determinations reveal that 1 and 2 consist of AI4N4 eight-membered rings in which the Al atoms are bridged by the nitrogens of the azide groups. [(CH3)C1AIN^]4 (1) crystallizes in the tetragonal space group P2jC with a = 11.077(4) , c = 8.662(4) , V = 1062.9(8) and = 8. [(Ch^BrAlN^k (2) crystallizes in the monoclinic space group P2.with a = 8.6702( = 90, V = 1123.23(3)3 and = 8. The reaction of AlH3N(CH3)3with HN3 resulted in formation of an azidoalane with composition close to A1H2N3N(CH3)3 (3). This compound is unstable with respect to loss of H2 and N(CH3)3 at room temperature.