Nitrogen aluminum

The pyrolysis of aluminum-nitrogen organic complexes, such as diethyl aluminum azide [(C2H5)2A1N3], is also used successfully at low deposition temperatures (450-870°C).0 l Another metallo-organic, hexakis(dimethylamido)dialuminum, reacting with ammonia allows deposition at 200-250°C at atmospheric pressure. 1... 

Fetter, N. R., and B. Bartocha The Chemistry of Aluminum-Nitrogen Compounds, I. Reactions of Trimethylaluminum and Trimethylalumi-num Trimethylamine with several Methylhydrazines. Canad. J. Chem. 39, 2001 (1961). 

The driving force for this reaction is the strength of the aluminum-oxygen bond relative to the aluminum-nitrogen bond. This reaction provides a good way of making synthetically useful amides of /V - in c th o x y - /V - m c th y I a in i n c.134 Trialkylamidotin and bis(hexamethyldi-... 

Another type of polymer in this category is similar to 7.10, but in which the O atoms are replaced by NH groups. These aluminum-nitrogen chains are thermally and hydrolytically unstable, and are sensitive to acids and bases.7 However, this polymer can also be drawn into fibers, which can be converted to aluminum nitride, AIN, in the presence of ammonia.68... 

One of the most interesting reactions involves trimethylaluminum with 2,6-diisopropylaniline. The initial product is an aluminum-nitrogen dimer, however, upon further heating additional alkane elimination occurs resulting in the Al-N trimer (Equation (10)) ... 

The recovery of actinide chlorides from ammonium chloralumi-nate by distillation of the solvent at 400°C resulted in very little of the uranium or thorium being carried over with the distillate. The aluminum/nitrogen ratios in the bottoms indicated a non-volatile compound that contained aluminum but not nitrogen. This latter compound may have been aluminum oxychloride. 

Similarly, aluminum-nitrogen rings are formed when triorganoaluminum compounds react pyrolytically with amines ... 

Most frequently, cubane or other aluminum-nitrogen cage supermolecules are formed through additional dative bonds (making the metal four-coordinate). ... 

It is witnessed that combustion products of the mixture AIF3 -I- 3NaNg over nitrogen pressure 4 MPa consist of three phases aluminum nitrogen, sodium aluminum hexafluoride, and sodium fluoride. On the assumption of the reflex magnitude relation it is fair to assume that Nag AlFg < AIN < NaF. 

These compoimds, and their gallium and indium analogs, serve as precursors for Group 13 nitride materials (AIN, GaN, InN) [117]. Because aluminum-nitrogen compounds have been reviewed [118-121], selected recent examples only will be discussed here. It is worth mentioning that recent mass spectral measurements show that the dimeric aggregates are preserved even in the gas phase, with partial disso-... 

The thermolysis of some aluminum-nitrogen dimers oceurs with the formation of self-assembled supermoleeules (rings and cages) based upon the AI2N2 ring, which seems to be readily formed [131],... 

Table 3.3. Aluminum-nitrogen interatomic distances in Al-N cage supermolecules.

The number of known cage aluminum-nitrogen supermolecules is much larger and the interested reader is referred to the review by Cucinella [121],... 

Aluminum nitride (AIN) is the only major compound known in the aluminum-nitrogen system (a nitrogen rich phase, AIN9 is also reported). It is formed by the reaction of NH3 and AIH3 and may be a stable phase of the condensed Al-N system. )... 

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