Rotating-bomb combustion calorimetry and the standard enthalpies of formation of two borinic esters

The standard massic energies of combustion of two borinic esters containing the intramolecular N→B bond having different stabilities were determined by oxygen rotating-bomb combustion calorimetry. The studied compounds were: diphenyl(2-pyridylmethoxy-O,N)borane (A1) and diphenyl {2-(2'-pyridyl)...

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Published inThe Journal of chemical thermodynamics Vol. 26; no. 4; pp. 337 - 343
Main Authors Torres, Luis Alfonso, Pérez, Alejandro, Farfán, Norberto, Castillo, Dolores, Santillan, Rosa Luisa
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier Ltd 01.04.1994
Elsevier
Subjects
Chemical thermodynamics
Chemistry
Elements, mineral and organic compounds
Exact sciences and technology
General and physical chemistry
Thermodynamic properties
Heat of combustion
Combustion bomb
Enthalpy
Boron Organic compounds
Thermodynamic properties
Experimental study
Heat of formation
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Summary:The standard massic energies of combustion of two borinic esters containing the intramolecular N→B bond having different stabilities were determined by oxygen rotating-bomb combustion calorimetry. The studied compounds were: diphenyl(2-pyridylmethoxy-O,N)borane (A1) and diphenyl {2-(2'-pyridyl)ethoxy-O,N}borane (A2). Based on the experimental results, the standard molar enthalpies of formation were determined as: ΔfHom{C18H16ONB(A1),cr} = -(194.6 ± 4.9}kJ·mol-1 and ΔfHom{C19H18ONB(A2),cr} = -(171.8 ± 3.2)kJ· mol-1.
ISSN:0021-9614
1096-3626
DOI:10.1006/jcht.1994.1043