Gallium complexes amines

Fig. 10 Chemical structure of the amine-phenol gallium complex...

Previously reported syntheses of the title compound have involved vacuumline techniques.1-2 We describe here a procedure in which commercially available Schlenk-type glassware is used.j The synthesis involves the reaction of the protic hydrogen of trimethylammonium chloride with a hydridic hydrogen of [GaH4], to liberate hydrogen and form the desired amine gallium complex. 

R3T1 compounds react readily with acids, halocarbons, or sulfur dioxide to form I TIX. They also form neutral complexes (R3TI L) with Lewis bases (L), eg, amines and phosphines, in a similar manner as the gallium and indium analogues. 

Template syntheses with the same ligand (3,5-di-t-butylcatechol) in the presence of ammonia with boron, aluminum, gallium, or strontium chloride, or with calcium or barium acetate produces, under oxidizing conditions, neutral complexes ML (M = BC1), ML2 (M = A1, Ga, Ca, Ba), and ML3H [181], The ligand L [fe(3,5-di-t-butyl-l-hydroxy-2-phenyl)amine] can be in different oxidation states the most important being the following 944 and 945 ... 

More recently, the synthesis of an amine-phenol complex of gallium(III) was described (Fig. 10). The antimalarial activities were in the micromolar range against the HB3 CQ-susceptible and Dd2 CQ-resistant strains. The authors proposed that the cytotoxic targeting properties of these kinds of metal complexes lie in the spatial orientation of substituents on the peripheral part of the molecule [98]. 

The tendency of the aluminium atom to complete its electron octet is manifested as the Lewis acidity of organoaluminium compounds. This is demonstrated by the formation of 1 1 complexes of trialkylaluminium with anions or bases such as ethers and amines. Organoaluminium compounds are generally more acid than the organoderivatives of boron, indium and gallium. For steric reasons, complex formation is more difficult in compounds of... 

The gallium ririy-dialkyldithiocarbamates are monomeric sohds that possess relatively low volatility. Improved volatihty is achieved with asymmetric secondary amines derivatives for example, the use of [Ga S2CN(Me)Hex 3] in a LP-MOCVD affords o -Ga2S3 thin films at 500 °C on GaAs(l 11). Whereas the monothiocarbamato coordination complex [Ga(SOCNEt2)3] affords thin films of GaS at 450 Again a more comprehensive array of the... 

A review of the chemistry of Group III complexes shows that many of the concepts of Werner s coordination chemistry may be applied to these elements. Furthermore, the differences observed in the complexing behavior between ammonia and trimethylamine refiect fundamental differences in the amines. Ammonia tends to give ionic compounds, whereas trimethylamine tends to give non-ionic products. Trends observed with the metal halides can be extrapolated into hydrides of boron, aluminum, and gallium. An extension of Werner s concepts provides a significant... 

Gallium(III) complexes, 129 amines, 129 amino acids, 141 arsenates, 135 borates, 134 borohydrides, 141 bromates, 135 carbonates, 134 caiboxylates, 135 chlorates, 135 citrates, 136 cyanides, 129 dithiocarbamates, 138 ethers, 136 fluorides, 138 germanates, 134 hydrides, 140 iodates, 135 p-ketoenolates, 134 lactates, 136 mixed halides, 139 molybdates, 135 nitrates, 135 peptides, 141 perchlorates, 135... 

Ga-ZSM-5 that is synthesized (167) in the presence of methylamine is characterized by a uniform distribution of gaUium throughout the framework. When both aluminum and gallium are present in the gel precursor, mixed complexes with methylamine are formed that are incorporated into the crystal lattice at different rates, while some unreacted gaUium amine... 

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