S. P. Verevkin, A. Heintz
Sep 1, 2000
Citations
1
Influential Citations
16
Citations
Journal
The Journal of Chemical Thermodynamics
Abstract
Abstract The standard (po = 0.1 MPa) molar enthalpies of formation ΔfHmo(l, or cr) at T = 298.15 K were determined by means of combustion calorimetry for 2-methylnitrobenzene, 2-ethylnitrobenzene, 2-isopropylnitrobenzene, 2-tert-butylnitrobenzene, 2,6-dimethyl-nitrobenzene, 2,6-di-isopropyl-nitrobenzene, and 2,4,6-tri-tert-butylnitrobenzene. The molar enthalpies of sublimation (or vaporization) of these compounds were obtained from the temperature dependence of the vapor pressure measured in a flow system. The resulting values ofΔfHmo (g) were obtained atT = 298.15 K and used to derive strain enthalpies of alkylnitrobenzenes. The intramolecular interactions of the substituents were discussed in terms of deviations ofΔfHmo (g) from group additivity rules. These values provide a further improvement on the group-contribution methodology for the estimation of the thermodynamic properties of organic compounds.