Thermal Decomposition of Aluminium Hydride Complexes with Trimethylamine and N-Heterocyclic Carbene

The decomposition of aluminum hydride complexes with trimethylamine and N-heterocyclic carbene—1,3-bis(2,6-diisopropylphenyl)-1,3-dihydro-2 H -imidazol-2-ylidene was studied by a static tensimetric method with a membrane null-manometer. The AlH 3 ·NMe 3 complex passes into vapor in the form of monomeric molecules and in unsaturated vapor slowly decomposes at 70‒80°С into solid aluminum, gaseous trimethylamine, and hydrogen. The decomposition is accompanied by an induction period, the duration of which decreases as temperature increases. The AlH 3 complex with carbene slowly decomposes at 170‒200°С with a rate practically independent of temperature.