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This research investigates the thermochemistry involved in the dissolution of a specific porphyrin compound.

March 26, 2026

Thermochemistry of Dissolution of 5,10,15,20-Tetrakis(1'-methylpyrid-4-yl)porphyrin Tetratosylate at 298.15 K

OKO. N. KrutovaIvanovo State University of Chemistry and Technology NBN. M. BerezinaIvanovo State University of Chemistry and Technology PKP. D. KrutovIvanovo State University of Chemistry and Technology

Key Points

This research investigates the thermochemistry involved in the dissolution of a specific porphyrin compound.
Synthesis of 5,10,15,20-tetrakis(1'-methylpyrid-4-yl)porphyrin tetratosylate
Determination of the enthalpies of solution using direct calorimetry
Calculation of standard enthalpies of formation using the additive group method
Enthalpies of solution were successfully measured in both water and aqueous KOH at 298.15 K
Standard enthalpies of formation were calculated with consideration of nearest-neighbor atoms

Abstract

The water-soluble 5,10,15,20-tetrakis(1'-methylpyrid-4-yl)porphyrin tetratosylate was synthesized. The enthalpies of solution of crystalline porphyrin in water and aqueous KOH at 298.15 K were determined by direct calorimetry. The standard enthalpies of formation of porphyrin were calculated by the additive group method based on group systematics with Benson-type classification of fragments, in which the influence of the nearest-neighbor atoms is taken into account.

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