References of "Cahay, René"
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See detailL'enseignement de la chimie aux étudiants du secondaire qui se destinent à l'université: Trois heures de chimie valent mieux qu'une
Cornélis, André ULg; Cahay, René ULg; Leyh, Bernard ULg

in Chimie Nouvelle (1998), 16

The major importance of a high quality chemistry education in secondary schools is highlighted by the analysis of the results of a procedure developed at the University of Liège to help the students ... [more ▼]

The major importance of a high quality chemistry education in secondary schools is highlighted by the analysis of the results of a procedure developed at the University of Liège to help the students starting their university education, to evaluate their level of basic chemistry competences and to improve them if necessary. It turns out that students who followed three weekly periods of chemistry per week in the secondary school are clearly favoured compared to those who had only one period. These discrepancies show up not only on the starting competence level but also on the progress realized during the remediation step. The starting competence level influences also the strategy chosen by the student for his/her individual remediation. [less ▲]

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See detailAbout the use of the empirical relations hnu(CT/Max)=f(ID) for the interpretation of ionization potentials.
Locht, Robert ULg; Cahay, René ULg; Momigny, Jacques et al

in Bulletin de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique. Sciences (1972), LVIII(7), 821-840

The UV absorption spectra of the charge transfer (CT) complexes formed by iodine with C2H2NH, C2H2O and C2H2S were studied in order to interprete the first ionization potential of these organic molecules ... [more ▼]

The UV absorption spectra of the charge transfer (CT) complexes formed by iodine with C2H2NH, C2H2O and C2H2S were studied in order to interprete the first ionization potential of these organic molecules by using the empirical relationships hn(CT/Max)=f(ID). Taking into account the basical specificity of these relations, the trend of the CT data shows C2H2NH and C2H2O to be n-donors towards iodine and the first ionization potential of the same donors could be ascribed to the removal of an electron from a non-bonding orbital localized on the heteroatom. Theoretical calculations however do not support this interpretation in the case of C2H2NH. [less ▲]

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