THERMOCHEMICAL STUDY OF 2- AND 3-ALKYL SUBSTITUTED THIOPHENES Energetic-structural correlations

摘要: The standard (p 0=0.1 MPa) molar enthalpies of formation, in the condensed phase, nine linear-alkyl substituted thiophenes, six position 2- and three 3-, at T=298.15 K, were derived from massic energies combustion, oxygen, to yield CO2(g) and H2SO4·115H2O(aq), measured by rotating-bomb combustion calorimetry. enthalpies of vaporization these compounds measured high temperature Calvet Microcalorimetry, so their the gaseous derived. results are discussed terms of structural contributions energetics alkyl-substituted thiophenes, and empirical correlations suggested for estimation standard molar T=298.15 K, 3-alkyl-substituted both in the gaseous phases.