Studies on metal hydroxy compounds. XI. Thermal analyses, decomposition kinetics, and infrared spectra of cadmium and zinc halide derivatives

1 September 1970

journal article
Published by Canadian Science Publishing in Canadian Journal of Chemistry

Vol. 48 (17) , 2656-2661
https://doi.org/10.1139/v70-449

Abstract

The thermal analyses of Cd₂(OH)₃X type of basic halides reveal that the decomposition occurs via a two-step dehydroxylation pattern, yielding CdOHX as an intermediate product after the initial mode. These results suggest that Cd₂(OH)₃X is an addition compound of the hydroxide and the 1:1 hydroxy-halide, i.e. Cd(OH)₂•CdOHX. Calorimetric measurements along with related enthalpy values for the decomposition reaction are given.The kinetics of thermal decomposition of the compounds are classified into two main groups: (i) two-dimensional contracting plate model equation and (ii) first-order rate law.The infrared spectral data of thirteen Cd and Zn basic halides in the frequency region 4000–250 cm⁻¹ are presented with their assignments.

Keywords

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