In Situ and Ex Situ Studies of Tetrammineplatinum(II) Chromate Thermolysis

Comparative analysis have shown that the thermolysis of complex salt [Pt(NH 3 ) 4 ]CrO 4 in synthetic air atmosphere under in situ and ex situ conditions proceeds in different routes. In contrast to in situ experiment, ex situ decomposition leads to formation of intermediate PtCrO 2 phase with delaf...

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Bibliographic Details
Published in:Russian journal of inorganic chemistry 2020-10, Vol.65 (10), p.1566-1570
Main Authors: Lagunova, V. I., Filatov, E. Yu, Plyusnin, P. E., Korenev, S. V.
Format: Article
Language:English
Subjects:
Ambient temperature
Ammonia
Chemistry
Chemistry and Materials Science
Chromates
Chromium oxides
Chromium plating
Coordination Compounds
Decomposition
Homogeneous mixtures
Inorganic Chemistry
Platinum
Thermal cycling
Thermal expansion
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Summary:Comparative analysis have shown that the thermolysis of complex salt [Pt(NH 3 ) 4 ]CrO 4 in synthetic air atmosphere under in situ and ex situ conditions proceeds in different routes. In contrast to in situ experiment, ex situ decomposition leads to formation of intermediate PtCrO 2 phase with delafossite structure. Final decomposition product is a homogeneous mixture of platinum metal and chromium(III) oxide. Complex [Pt(NH 3 ) 4 ]CrO 4 has been shown to have negative volumetric coefficient of thermal expansion in the temperature range 30–200°C (–1.9 × 10 –5 1/K). Ex situ experiments have shown stability of the complex on consecutive cyclic heating to 200°C and cooling to ambient temperature
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023620100150