Sulfur–chlorine bond dissociation enthalpies in methane- and benzene-sulfonyl chlorides

Autor:	Jolanta M. Kanabus-Kaminska, David Griller, Fred P. Lossing, Chryssostomos Chatgilialoglu
Rok vydání:	1994
Předmět:	Sulfonyl chemistry.chemical_classification chemistry.chemical_compound Standard enthalpy of reaction chemistry Radical Inorganic chemistry Sulfonyl halide Phenyl group Appearance energy Heterolysis Medicinal chemistry Dissociation (chemistry)
Zdroj:	J. Chem. Soc., Perkin Trans. 2. :357-360
ISSN:	1364-5471 0300-9580
DOI:	10.1039/p29940000357
Popis:	Sulfur-chlorine bond dissociation enthalpies in methane- and benzene-sulfonyl chlorides, D(RSO2–Cl), were measured by photoacoustic calorimetry and were found to be equal within experimental error (295 kJ mol–1). The implicit absence of a stabilizing effect of the phenyl group in PhSO2˙ is consistent with the known spectroscopic properties of sulfonyl radicals but conflicts with the currently accepted thermochemical data. Appearance energy measurements lead to values for the radical ionization potentials, Ei(MeSO2)= 8.67 and Ei(PhSO2˙)= 7.49 eV and for the enthalpy changes associated with the heterolytic cleavages RSO2Cl→RSO2++ Cl– where a substituent effect is observed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cd24557a2cfb2ac986a5d6a2a84737de https://doi.org/10.1039/p29940000357 Zobrazit plný text záznamu