{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,9,20]],"date-time":"2025-09-20T19:10:14Z","timestamp":1758395414207},"reference-count":43,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2007,5,9]],"date-time":"2007-05-09T00:00:00Z","timestamp":1178668800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J of Physical Organic Chem"],"published-print":{"date-parts":[[2007,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The gaseous standard molar enthalpies of formation of two 2\u2010R\u20103\u2010methylquinoxaline\u20101,4\u2010dioxides (R\u2009=\u2009benzoyl or <jats:italic>tert<\/jats:italic>\u2010butoxycarbonyl), at <jats:italic>T<\/jats:italic>\u2009=\u2009298.15\u2009K, were derived using the values for the enthalpies of formation of the compounds in the condensed phase, measured by static bomb combustion calorimetry, and for the enthalpies of sublimation, measured by Knudsen effusion, using a quartz crystal oscillator. The three dimensional structure of 2\u2010<jats:italic>tert<\/jats:italic>\u2010butoxycarbonyl\u20103\u2010methylquinoxaline\u20101,4\u2010dioxide has been obtained by X\u2010ray crystallography showing that the two N\uf8ffO bond lengths in this compound are identical. The experimentally determined geometry in the crystal is similar to that obtained in the gas\u2010phase after computations performed at the B3LYP\/6\u2010311\u2009+\u2009G(2d,2p) level of theory. The experimental and computational results reported allow to extend the discussion about the influence of the molecular structure on the dissociation enthalpy of the N\uf8ffO bonds for quinoxaline 1,4\u2010dioxide derivatives. As found previously, similar N\uf8ffO bond lengths in quinoxaline\u20101,4\u2010dioxide compounds are not linked with N\uf8ffO bonds having the same strength. Copyright \u00a9 2007 John Wiley &amp; Sons, Ltd.<\/jats:p>","DOI":"10.1002\/poc.1184","type":"journal-article","created":{"date-parts":[[2007,5,9]],"date-time":"2007-05-09T16:34:57Z","timestamp":1178728497000},"page":"491-498","source":"Crossref","is-referenced-by-count":10,"title":["Energetic and structural characterization of 2\u2010R\u20103\u2010methylquinoxaline\u20101,4\u2010dioxides (R\u2009=\u2009benzoyl or <i>tert<\/i>\u2010butoxycarbonyl): experimental and computational studies"],"prefix":"10.1002","volume":"20","author":[{"given":"Jos\u00e9 R. 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