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Russian Journal of General Chemistry

, Volume 89, Issue 10, pp 2163–2164 | Cite as

Thermochemistry of Heteroatomic Compounds. Enthalpy of Dissolution and Vaporization of Selected Trimethylsilyl Di- and Tetrathiophosphates

  • V. V. OvchinnikovEmail author
  • S. A. Mal’tseva
  • N. V. Kremleva
Letters to the Editor
  • 8 Downloads

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(MRDα). The obtained vaporization values can be used to calculate the heats of formation of similar, thermally unstable, compounds for experimental calorimetry.

Keywords

enthalpy of dissolution enthalpy of vaporization trimethylsilyl dithiophosphates trimethylsilyl tetrathiophosphates 

Notes

Acknowledgments

Authors are grateful to I.S. Nizamov (Kazan Federal University) for the provided substances.

Conflict of Interest

No conflict of interest was declared by the authors.

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Copyright information

© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  • V. V. Ovchinnikov
    • 1
    Email author
  • S. A. Mal’tseva
    • 1
  • N. V. Kremleva
    • 1
  1. 1.A.N. Tupolev Kazan National Research Technical University (KAI)KazanRussia

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