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  • 1
    Electronic Resource
    Electronic Resource
    Paradigms and Paradoxes Are Acyl Azides Resonance Stabilized? (1999)
    Springer
    Structural chemistry 10 (1999), S. 327-329 
    Details
    ISSN: 1572-9001
    Keywords: Acyl azides ; Curtius rearrangement ; enthalpy of formation ; enthalpy of reaction ; phenyl/vinyl thermochemical equivalence, resonance energy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract By means of the generic isodesmic reaction C6H5COX + RCH3 → C6H5COCH3 + RX, the phenyl/vinyl thermochemical equivalence, and an experimental determination of the enthalpy of the Curtius rearrangement of acryloyl azide, the resonance energy of acyl azides was ascertained to be ca. 29 kJ mol−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022055304484
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Thermochemical studies for determination of the molar enthalpy of formation of aniline derivatives (1996)
    Springer
    Structural chemistry 7 (1996), S. 367-373 
    Details
    ISSN: 1572-9001
    Keywords: Aromatic amines ; correlation gas chromatography ; enthalpy of combustion ; enthalpy of formation ; thermochemistry ; vaporization enthalpy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The standard (p o=0.1 MPa) molar enthalpies of combustion atT=298.15 K were measured by static bomb combustion calorimetry for liquidN,N-diethylaniline,N,N-dimethyl-m-toluidine,N,N-dimethyl-p-toluidine, andN-ethyl-m-toluidine. Vaporization enthalpies forN,N-dimethyl-m-toluidine andN-ethyl-m-toluidine were determined by correlation gas chromatography. Derived standard molar values of δf H m o (g) at 298.15 K forN,N-diethylaniline (62.1±7.6);N,N-dimethyl-m-toluidine (72.6±7.3),N,N-dimentyl-p-toluidine (68.9±7.4),N-ethyl-m-toluidine (30.5±3.8 kJ· mol−1) were obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02275163
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The sublimation enthalpy of dimethyl oxalate (1996)
    Springer
    Structural chemistry 7 (1996), S. 391-395 
    Details
    ISSN: 1572-9001
    Keywords: Sublimation enthalpy ; dimethyl oxalate ; vaporization enthalpy ; correlation gas chromatography ; formation enthalpy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The sublimation enthalpy of dimethyl oxalate has been measured by calorimetric and head space analysis. These results along with vaporization enthalpy measured by correlation gas chromatography and fusion enthalpy measurements are compared to results predicted by two estimation techniques. A previous experimental measurement was found to be in error. A mean value of (75.2±0.5) kJ/mol was obtained which results in a corrected molar value of (−681.5±0.8) kJ/mol for the enthalpy of formation of gaseous dimethyl oxalate, δf H m o (g, 298.15 K). This new value of δf H m o (g, 298.15 K) for dimethyl oxalate, in combination with other enthalpies of formation, suggests that the ground state of oxalates are destabilized relative to α-diketones by approximately 25 kJ/mol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02275166
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    Paper (German National Licenses)
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