کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
216425 | 1426320 | 2007 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Thermochemical study of some chloro and bromo alkyl substituted phthalimides: Structural–energetic correlations Thermochemical study of some chloro and bromo alkyl substituted phthalimides: Structural–energetic correlations](/preview/png/216425.png)
The standard (p∘ = 0.1 MPa) massic energies of combustion, Δcu∘, for crystalline N-chloromethylphthalimide, N-(2-chloroethyl)phthalimide, N-(2-bromoethyl)phthalimide, and N-(3-bromopropyl)phthalimide were determined, at the temperature 298.15 K, using a rotating-bomb combustion calorimeter. The standard molar enthalpies of sublimation, ΔcrgHm∘, at T = 298.15 K were determined for all compounds by Calvet microcalorimetry and for N-chloromethylphthalimide also derived from the variation with the temperature of its vapour pressures measured by the Knudsen effusion technique. The results obtained were as follows: −Δcu∘(cr)/(kJ · g−1)ΔcrgHm∘/(kJ·mol-1)N-Chloromethylphthalimide20720.1±4.5103.6±0.9N-(2-Chloroethyl)phthalimide22479.3±6.898.4±1.9N-(2-Bromoethyl)phthalimide18501.6±2.8108.7±1.0N-(3-Bromopropyl)phthalimide19965.8±5.4116.0±1.0Full-size tableTable optionsView in workspaceDownload as CSVThese values were used to derive the standard molar enthalpies of formation of the compounds in their crystalline and gaseous phases, respectively. The derived standard molar enthalpies of formation, in the gaseous state, are analyzed in terms of enthalpic increments and interpreted in terms of molecular structure.
Journal: The Journal of Chemical Thermodynamics - Volume 39, Issue 10, October 2007, Pages 1363–1371