Experimental thermochemical study of the monochloronitrobenzene isomers

• Type: Article in International Scientific Journal
• Date: 2009

Authors

da Silva, MAVR (Author) FCUP; Ana I M C L Lobo Ferreira (Author) FCUP; Moreno, ARG (Author) Other

Journal

Title: Journal of Chemical Thermodynamics

Vol. 41

Pages: 109-114

ISSN: 0021-9614

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 19 Citations

Scopus - 16 Citations

Other information

Authenticus ID: P-003-QV3

DOI: 10.1016/j.jct.2008.07.012

Abstract (EN): The standard (p(o) = 0.1 MPa) molar enthalpies of formation of 2-, 3-, and 4-chloronitrobenzene isomers, in the crystalline state, at T = 298.15 K, were derived from the standard (p(o) = 0.1 MPa) massic energies of combustion, in oxygen, at T = 298.15 K, measured by rotating bomb combustion calorimetry. The standard molar enthalpies of sublimation of the isomers, at T = 298.15 K, were obtained by high temperature Calvet microcalorimetry. [GRAPHICS] From the determined experimental data, the values of the gaseous standard (p(o) = 0.1 MPa) molar enthalpies of formation for the three monochloronitrobenzene isomers were derived. The gas-phase enthalpies of formation were also estimated by the empirical scheme developed by Cox showing that for meta- and para-chloronitrobenzene the estimated values are in close agreement with the experimental ones whereas, in the case of ortho-chloronitrobenzene it is shown that a different enthalpic interaction increment is needed, when the substituents in the adjacent carbon ring atoms are a chlorine atom and a nitro group.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6