Chromium energy decomposition

Chromium-chromium multiple bonds have also been theoretically analysed using an extended transition state energy decomposition scheme combined with the natural orbitals for chemical valence. This method allowed analysis of the contributions of that the individual ct, n and 5 interactions make to overall strength of the Cr-Cr bond, as well as the influence of axial ligands. 

Compensation behavior found for the decomposition of hydrogen peroxide on preparations of chromium (III) oxide, which had previously been annealed to various temperatures, was attributed to variations in the energy states of the active centers (here e 0.165). Compensation behavior has also been observed (284) in the decomposition of hydrogen peroxide on cobalt-iron spinels the kinetic characteristics of reactions on these catalysts were ascribed to the electronic structures of the solids concerned. 

As examples of series of related reactions, compensation effects have been described [53] for the thermal decompositions of [CoXj (aromatic amine)2] type complexes (7 reactions) and also for a series of cobalt (III) and chromium (III) complexes (22 compounds studied in which two compensation trends were identified). Later work [54] examined the dehydrations and deamminations of dioximine complexes (two compensation trends identified), and [Co(NCS)2(ammine)2]-type complexes (three compensation trends identified). The systems involving larger entropy changes required less energy for activation [53]. Separate compensation plots for the dehydrations and the decompositions of eleven alkali and alkaline-earth metal dithionates were described by Zsako et al. [55]. 

Figure 7-85. Chromium production by direct decomposition of its trichloride (CrCls) in atmospheric-pressure thermal plasma. Energy cost of the process at different quenching modes (1) absolute quenching (2) ideal quenching ...

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