Authors: CherkasovaT.G., CherkasovaYe.V., IsakovaI.V.,TikhomirovaA.V., BobrovnikovaA.A.

Title of the article: Thermal analysis of double complex compounds of lanthanum(III) with neutral organic ligands and inert anions rhodanide complex of chromium(III)

Year: 2018, Issue: 2, Pages: 120-126

Branch of knowledge: Chemical technology

Index UDK: 54-386:546[654.763]:547:[544.2.327.826.1]

DOI: 10.26730/1999-4125-2018-2-120-126

Abstract: The article presents the results of the studies of bimetallic coordination compounds. The substances are either crystalline hydrates or crystalline solvates of organic ligands in cations. Hexarodanochromate(III) -anion is much more resistant to heating than the anion of the Reineke salt. Thermal gravimetric, X-ray phase and IR spectroscopic methods have been used to study the thermal decomposition of double complex lanthanum(III) compounds with neutral organic ligands and anions [Cr(NCS)6]3- and [Cr(NH3)2(NCS)4]- in air and anions in an inert atmosphere. It is shown that the processes of thermolysis of double complex compounds in air and in an inert atmosphere have a similar character and reflect multi-stage processes of mass loss. The compositions of the solid thermolysis products at each decomposition stage are heated by X-ray diffraction and IR spectroscopy. Formulations of solid products of thermal decomposition are established, in air at 1000 ° C, which are mixtures of lanthanum(III) and chromium(III) oxides. It is concluded that coordination compounds with inert chromium(III) anions are suitable for the preparation of mixed oxide systems by thermal decomposi-tion of double complex compounds in air at relatively low temperatures, and some of them change color upon heating, this can be used in thermo-indicator devices.

Key words: double complex compounds thermolysis lanthanum(III) chromium(III)

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