Kinetics of solid-phase ligand-substitution reactions in diammine(1,4,8,11-Tetraazaundecane)chromium(III) bromide isomers
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The kinetics of solid-phase reactions of substitution of coordinated ammonia by outer-sphere bromide ions in [CrL(NH3)2]2Br3·nH2O, where L is 1,4,8,11- tetraazaundecane, n ≠ 2–2.5, was studied by a nonisothermal method by differential thermogravimetry, mass spectrometry, and investigations in a flow-type reactor. The kinetic stability of the isomeric salts increases in the series trans<cis-β<cis-d. Tetragonal distortion of the chromophore is of decisive significance for the trans isomer, while the difference in the stability of the cis isomers is related to the structure of their crystal lattices.
KeywordsAmmonia Mass Spectrometry Chromium Bromide Thermogravimetry
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