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Journal of Solution Chemistry

, Volume 27, Issue 3, pp 235–243 | Cite as

Thermochemistry of Aqueous Solutions of Alkylated Nucleic Acid Bases. X. Enthalpies of Hydration of Cytosine and some Methylated, Hydroxy and Methoxy Derivatives of Cytosine

  • A. Zielenkiewicz
  • M. Wszelaka-Rylik
  • J. Poznański
  • W. Zielenkiewicz
Article

Abstract

Enthalpies of solution in water, vapor pressures, and enthalpies of sublimation were determined for cytosine and a number of crystalline derivatives of cytosine: 1-methylcytosine, 1-methyl-N4-hydroxycytosine, 1,5-methyl-N4-methoxycytosine, 1,N4,N4-trimethylcytosine, 1,5,N4-trimethylcytosine, 1,5-dimethyl-N4-methoxycytosine, and l,N4-dimethyl-5-ethylcytosine. Enthalpies of hydration were calculated. The latter were analyzed on the basis of the group additivity method. The relation between enthalpy of hydration and polarity of compounds is discussed.

Enthalpy of solution enthalpy of sublimation vapor pressure hydroxycytosines methoxycytosines methylated cytosines 

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Copyright information

© Plenum Publishing Corporation 1998

Authors and Affiliations

  • A. Zielenkiewicz
    • 1
  • M. Wszelaka-Rylik
    • 1
  • J. Poznański
    • 1
    • 2
  • W. Zielenkiewicz
    • 1
  1. 1.Institute of Physical ChemistryPolish Academy of SciencesWarsawPoland
  2. 2.Institute of Biochemistry and BiophysicsPolish Academy of SciencesPawińskiego 5aPoland

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