Thermochemistry of Heteroatomic Compounds. Enthalpy of Dissolution and Vaporization of Selected Trimethylsilyl Di- and Tetrathiophosphates
- Authors: Ovchinnikov V.V.1, Mal’tseva S.A.1, Kremleva N.V.1
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Affiliations:
- A.N. Tupolev Kazan National Research Technical University (KAI)
- Issue: Vol 89, No 10 (2019)
- Pages: 2163-2164
- Section: Letters to the Editor
- URL: https://journals.rcsi.science/1070-3632/article/view/223142
- DOI: https://doi.org/10.1134/S1070363219100293
- ID: 223142
Cite item
Abstract
Enthalpy of vaporization (ΔvapH°) of trimethylsilyl esters of dithio- and tetratiophosphoric acids (RX)2P(S)SSiMe3 (X = O, S) have been determined from the experimentally determined enthalpies of their dissolution (ΔdissH°) in n-hexane at 296–298 K and the values of molar refraction (MRD) with correction a for the branching of the carbon substituent according to the equation ΔvapH° = ΔdH°(n-hexane) + 4.39 + 1.05(MRD − α). The obtained vaporization values can be used to calculate the heats of formation of similar, thermally unstable, compounds for experimental calorimetry.
About the authors
V. V. Ovchinnikov
A.N. Tupolev Kazan National Research Technical University (KAI)
Author for correspondence.
Email: chem_vvo@mail.ru
Russian Federation, ul. K. Marksa 10, Kazan, 420111
S. A. Mal’tseva
A.N. Tupolev Kazan National Research Technical University (KAI)
Email: chem_vvo@mail.ru
Russian Federation, ul. K. Marksa 10, Kazan, 420111
N. V. Kremleva
A.N. Tupolev Kazan National Research Technical University (KAI)
Email: chem_vvo@mail.ru
Russian Federation, ul. K. Marksa 10, Kazan, 420111