Thermochemistry of the Dissolution of Tetra-4-(4'-carboxyphenyoxy)- and Tetra-4-(4'-carboxyphenylthio)phthalocyanines of Copper in Aqueous Solutions of KOH at 298.15 K

The authors obtain complexes CuPc(4-S-C 6 H 4 -COOH) 4 and CuPc(4-O-C 6 H 4 -COOH) 4 that are insoluble in water. The standard enthalpies of formation of these compounds are calculated using additive groups based on group systematics with Benson-type classification of fragments, allowing for the inf...

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Bibliographic Details
Published in:Russian Journal of Physical Chemistry A 2023-06, Vol.97 (6), p.1142-1147
Main Authors: Krutova, O. N., Maizlish, V. E., Chernikov, V. V., Tikhomirova, T. V., Krutov, P. D.
Format: Article
Language:English
Subjects:
Aqueous solutions
Chemistry
Chemistry and Materials Science
Dissolution
Enthalpy
Physical Chemistry
Physical Chemistry of Solutions
Temperature effects
Thermochemistry
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Summary:The authors obtain complexes CuPc(4-S-C 6 H 4 -COOH) 4 and CuPc(4-O-C 6 H 4 -COOH) 4 that are insoluble in water. The standard enthalpies of formation of these compounds are calculated using additive groups based on group systematics with Benson-type classification of fragments, allowing for the influence of the atoms’ primary environment. Thermal effects of the dissolution of crystalline phthalocyanines in aqueous solutions of various KOH concentrations at a temperature of 298.15 K were determined via direct calorimetry. Thermal effects of the stepwise dissociation of CuPc(4-S-C 6 H 4 -COOH) 4 , CuPc(4-O-C 6 H 4 -COOH) 4 are calculated using the HEAT computer program. Standard enthalpies of formation are calculated for products of the dissociation of CuPc(4-S-C 6 H 4 -COOH) 4 and CuPc(4-O-C 6 H 4 -COOH) 4 in an aqueous solution.
ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024423060134