Gallium complexes arsenates

These point defect models need to be regarded as a first approximation. Calculations for stoichiometric GaAs suggest that balanced populations of vacancies on both gallium and arsenic sites, VGa and VAs, exist, as well as defect complexes. Calculation for nonstoichiometric materials would undoubtedly throw further light on the most probable defect populations present. 

The halides, GaQs, AlBrs, A1C13, and FeCl3, very probably also exist in dimeric form. With these halides, however, the complexation reaction with the azide is the fast step so that no square-root term is found in the kinetic equation. Arsenic trichloride, arsenic tribromide, phosphorus trichloride, and phosphorus pentachloride were without effect on the rate of decomposition of benzoyl azide. Finally, the authors have observed that the catalytic influence of boron tribromide was much higher than all the other halides. Its rate constant was estimated to be about 18 times larger than that for gallium chloride. 

A method which can be used as a screen for all heavy metals has not yet been devised. However, the following method will detect antimony, arsenic, bismuth, cadmium, lead, mercury, and Gallium. Certain metals do not form complexes, e.g. barium and chromium, and these may be detected in trace amounts by direct application to the Lithium Fluoride-Graphite Mixture. 

MeOC6H4)3As 3] and [Ga2l4(AsEt3)2], respectively. The last is a unique example of a gallium-tertiary arsine complex containing a Ga-Ga bond, and these complexes serve to illustrate the subtle effect of the organic substituent on the chemistry of the arsenic atom. 

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... 

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