The Preparation and Reactions of Dialkylamino Derivatives of Aluminum

The Aluminum–Nitrogen Bond in Monomeric Bis(amino)alanes: A Systematic Experimental Study of Bis(tetramethylpiperidino)alanes and Quantum Mechanical Calculations on the Model System (H2N)2AlY

“…However, in the monomeric tris(amides) Al[N(SiMe 3 )] 3 [12] molecular amine elimination and formation of oligomeric iminoalanes (RAlϪNR) n (n ϭ 2Ϫ8) [31] [32] . The anilide and Al(NiPr 2 ) 3 [33] similar or even shorter AlϪN bond Figure 4. Molecular structure of one of the two independent species Figure 6.…”

Tris(dialkylamino)aluminums: Syntheses, characterization, volatility comparison and atomic layer deposition of alumina thin films

“…The synthetic methods utilized to arrive at these novel alumina precursors have one commonality-to minimize halide content and cost [10], [11] and [12]. The preparation of Al(DEA) 3 uses inexpensive LiAlH 4 as the aluminum source whereas Al(DIA) 3 employs the alane, AlH 3 ·NMe 3 .…”

“…From the atmospheric pressure thermogravimetric analysis (TGA, Figure 2) both precursors evaporate with onset temperatures of 200 °C and 150 °C for 1 and 2, respectively. Although counterintuitive since 1 is a liquid, it is believed to exist as a dimer in this phase but evaporates as the monomer requiring more energy to break its dimeric structure [10], [15] and [17]. This is unlike 2 which exists as a monomer, in both the solid and vapor phase [12].…”

“…To assess potential alternatives to trimethylaluminum (TMA) we began investigating homoleptic Al 3+ aminos as ALD precursors [10], [11] and [12]. Previously, this general class of molecules received only modest attention from the thin film community, mostly for the growth of nitrides (or oxides) from solid, crystalline sources [13] and [14].…”

Aluminum Hydride Derivatives From the Reactions of Lithium Aluminum Hydride With Trimethylamine and Dimethylamine

“…If a tetrahydrofuran solution of LiAlI-Ia is treated with diinethylarnine until hydrogen evolution ceases, a precipitate is formed and LiAl(NR111e~)~ solvated with tetrahydrofuran may be isolated from solution (6). The worlc in this laboratory has demonstrated that the equinlolar reaction of lithium alunlinuin hydride and dimethylamine in ethyl ether solution yields hydrogen, a precipitate, and diillethylaillino aluminum hydride.…”