Solution thermodynamic studies. 5. A thermodynamic study of solvent effects on the relative stability of diastereoisomers. The trans-1,2-dibromo-4-tert-butylcyclohexane, trans-2,3-dibromodecalin, and 1-bromo-4-tert-butylcyclohexane systems

1980 ◽  
Vol 102 (12) ◽  
pp. 4150-4154 ◽  
Author(s):  
J. J. Moura Ramos ◽  
L. Dumont ◽  
M. L. Stien ◽  
J. Reisse
Keyword(s):  
Solvent Effects ◽  
Relative Stability ◽  
Thermodynamic Study ◽  
Thermodynamic Studies

Energétique des liaisons inter- et intramoléculaires dans les trois isomères de l'aminopyridine

1998 ◽  
Vol 76 (1) ◽  
pp. 18-24 ◽  
Author(s):  
Raphaël Sabbah ◽  
Maria Ermelinda da Silva Eusébio
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
General Formula ◽  
Triple Point ◽  
Relative Stability ◽  
Combustion Calorimetry ◽  
Thermodynamic Study ◽  
Enthalpy Of Combustion ◽  
Resonance Energies

The present work is concerned with a thermodynamic study of the three aminopyridine (AP) isomers (general formula: C5H6N2). It was achieved using three techniques: combustion calorimetry of small amounts of substance (a few milligrams), sublimation calorimetry, and differential thermal analysis. From this study, it was possible to determine the enthalpies of combustion, sublimation, and fusion of these compounds and their triple point temperatures; to discuss the relative stability of the three molecules; to determine the experimental resonance energies and compare them with the theoretical values; to determine the atomization enthalpies and compare them with the values calculated from the energetical contributions previously determined in our laboratory; to determine the enthalpy of the intermolecular bonds.Key words: aminopyridine isomers; enthalpy of combustion, of sublimation, of fusion, of inter- and intramolecular bonds.

Au-Si and Au-Ge Phases Diagrams for Nanosytems

2010 ◽  
Vol 653 ◽  
pp. 77-85 ◽  
Author(s):  
Djamila Hourlier ◽  
Pierre Perrot
Keyword(s):  
Phase Diagrams ◽  
Relative Stability ◽  
Binary Systems ◽  
Metastable Phase ◽  
Semiconductor Nanowires ◽  
Thermodynamic Study ◽  
Condensed Phases

A thermodynamic study describing relative stability of different systems solid and liquid at equilibrium involved in the growth of semiconductor nanowires is reported. A number of stable and metastable phase diagrams, taking into account the size and the shape of condensed phases are calculated for the two binary systems Au-Si and Au-Ge.

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