Energetic studies of two oxygen heterocyclic compounds Xanthone and tetrahydro-gamma-pyrone

• Type: Article in International Conference Proceedings Book
• Date: 2009

Authors

Vera L S Freitas (Author) Other; Jose R B Gomes (Author) Other; Maria D M C R Ribeiro da Silva (Author) FCUP

Conference proceedings International

Title: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY

Pages: 827-833

30th Italian National Confernece of Calorimetry and Thermal Analysis (AICAT 2008)

Pisa, ITALY, DEC 09-12, 2008

Indexing

ISI Web of Knowledge - 27 Citations

Scopus - 27 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-003-GAB

DOI: 10.1007/s10973-009-0233-y

Abstract (EN): The present work reports an experimental thermochemical study supported by state of the art calculations of two heterocyclic compounds containing oxygen in the ring: xanthone and tetrahydro-gamma-pyrone. The standard (pA(0)A = 0.1 MPa) molar enthalpies of formation in the condensed phase, at T = 298.15 K, were derived from the measurements of the standard molar energies of combustion in oxygen atmosphere, using a static bomb calorimeter. The standard molar enthalpies of sublimation or vaporization, at T = 298.15 K, of the title compounds were obtained from Calvet microcalorimetry measurements. These values were used to derive the standard enthalpies of formation of the compounds in the gas-phase at the same temperature, which were compared with estimated data from G3(MP2)//B3LYP computations.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7