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


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.


enthalpy of dissolution enthalpy of vaporization trimethylsilyl dithiophosphates trimethylsilyl tetrathiophosphates 



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.


  1. 1.
    Ovchinnikov, V.V., Lapteva, L.I., Sitnikova, E.Yu., and Konovalov, A.I., Russ. Chem. Bull., 2000, no. 9, p. 1533.Google Scholar
  2. 2.
    Corbridge, D.E., Phosphorus. An Outline of Its Chemistry, Biochemistry, and Technology, Amsterdam: Elsevier, 1980.Google Scholar
  3. 3.
    Purdela, D. and Vilceanu, R., Chimia Compusilor Organici al Fosforului si al Acizilor Lui, Editura Academici Republicii Socialiste Romania, 1965.Google Scholar
  4. 4.
    Schrader, G., Die Entwicklung neuer insektizider Phosphorsdure-Ester, 3rd ed., Verlag Chemie, Die Entwicklung neuer insektizider Phosphorsdure-Ester, 3rd ed., Weinheim: Verlag Chemie, 1963.Google Scholar
  5. 5.
    Cherkasov. R.A., Stroenie i reaktsionnaya sposobnost’ organicheskikh soedinenii (The Structure and Reactivity of Organic Compounds), Moscow: Nauka, 1978, p. 107.Google Scholar
  6. 6.
    Ovchinnikov, V.V., Brus’ko, V.V., and Sobanov, A.A., Thermochim. Acta, 1994, vol. 233, p. 153. CrossRefGoogle Scholar
  7. 7.
    Batsanov, S.S., Strukturnaya refraktometriya (Structural Refractometry), Moscow: Vysshaya Shkola, 1976.Google Scholar
  8. 8.
    Lebedev, Yu.A. and Miroshnichenko, E.A., Termokhimiya paroobrazovaniya organicheskikh veshchestv (Thermochemistry of Vaporization of Organic Substances), Moscow: Nauka, 1981.Google Scholar
  9. 9.
    Keil, B., Laboratorni technika organicki chemie, Prague: NCSAV, 1966.Google Scholar
  10. 10.
    Nizamov, I.S., Kuznetzov, V.A., Batyeva, E.S., Al’fonsov, V.A., and Pudovik, A.N., Phosphorus, Sulfur, Silicon, Relat. Elem., 1993, vol. 79, p. 179. CrossRefGoogle Scholar
  11. 11.
    Nizamov, I.S., Kuznetzov, V.A., Batyeva, E.S., Al’fonsov, V.A., Pudovik, A.N., Heteroatom. Chem., 1993, vol. 4, p. 379. CrossRefGoogle Scholar
  12. 12.
    Nizamov, I.S., Kuznetzov, V.A., Batyeva, E.S., Al’fonsov, V.A., and Pudovik, A.N., Heteroatom. Chem., 1994, vol. 5, p. 107. CrossRefGoogle Scholar
  13. 13.
    Vasil’ev V.P., Borodin V.A., and Frolov V.Yu., Teor. Eksp. Khim., 1988, vol. 24, p. 507.Google Scholar

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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