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- W1998444904 abstract "The standard (po = 0.1 MPa) molar enthalpies of formation ΔfHmo(l or cr) at T = 298.15 K were measured by means of combustion calorimetry for 2-tert-butylphenol, 2-tert-butyl-5-methylphenol, 2-tert-butyl-4-methylphenol, 2,4-di-tert-butylphenol, 3-tert-butylphenol, 4-tert-butylphenol, 2-methyl-4-tert-butylphenol, 4-tert-amylphenol, and 4-tert-octylphenol. The standard molar enthalpies of sublimation (or vaporization) of these compounds, and also of 2-tert-amylphenol, 2,4-di-tert-amylphenol, 2-tert-octylphenol, and 2,4-di-tert-octyl-phenol were obtained from the temperature dependence of the vapour pressure measured in a flow system. Molar enthalpies of fusion Δcr1Hmoof the solid compounds were measured by d.s.c. Resulting values of ΔfHmo(g) were obtained atT = 298.15 K and used to derive strain enthalpies of tert-alkylphenols. The intra-molecular interactions of the substituents were discussed in terms of deviations of ΔfHmo(g) from the group additivity rules. The interaction energy of the tert-alkyl and OH groups in the gas phase was found to be 12.5 kJ· mol−1for theortho-interaction, 1.7 kJ· mol−1for thepara-interaction, and 2.6 kJ· mol−1for themeta-interaction. These values provided a further improvement on the group-contribution methodology for estimation of the thermodynamic properties of organic compounds." @default.
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- W1998444904 date "1999-05-01" @default.
- W1998444904 modified "2023-09-26" @default.
- W1998444904 title "Thermochemistry of phenols: quantification of theortho-,para-, andmeta-interactions in tert-alkyl substituted phenols" @default.
- W1998444904 doi "https://doi.org/10.1006/jcht.1998.0459" @default.
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