Abstract
Densities and specific heat capacities of aqueous solutions: 1-methylcytosine; 1-methyl-N4-hydroxycytosine; 1,5-dimethylcytosine; I,N4-dimethylcytosine; 1,5-dimethyl-N4-hydroxycytosine; 1-methyl-N4-methoxycytosine; 1,N4,N4-trimethylcytosine, 1,5-dimethyl-N4-methoxycytosine were determined using flow calorimetry and flow densimetry at 25°C. Apparent molar volumes and heat capacities were then determined. Molecular excluded volumes were evaluated. A relationship was found between the values of the increments in partial molar values and the kind of groups substituted. Four types of contributions were distinguished: substitution of hydrogen on C, N, and O (in OH group on N4) atoms by CH3 group and replacement of hydrogen on N4 atom by OH group. The correlation between the experimental partial molar volumes and calculated molecular excluded volumes was also elaborated.
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Zielenkiewicz, A., Busserolles, K., Roux-Desgranges, G. et al. Apparent molar volumes, heat capacities, and molecular excluded volumes of methylated, hydroxy and methoxy derivatives of 1-methylcytosine in aqueous solutions at 25°C. J Solution Chem 25, 529–539 (1996). https://doi.org/10.1007/BF00973083
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DOI: https://doi.org/10.1007/BF00973083