References of "Journal of Chemical Education"
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See detailSimple and Automatic Closed Grinding and Extraction System
Fischer, Christophe ULg; Lognay, Georges ULg

in Journal of Chemical Education (2012)

This article describes a simple, automatic, and closed grinding system for small samples using common laboratory equipment that is particularly useful for air-sensitive samples or volatile compounds ... [more ▼]

This article describes a simple, automatic, and closed grinding system for small samples using common laboratory equipment that is particularly useful for air-sensitive samples or volatile compounds analyses. [less ▲]

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See detailCorrections: Quantum Chemistry Lab at Home: A Microsoft Windows Alternative
Olive, Gilles ULg; Riffont, David

in Journal of Chemical Education (2009), 86(10), 1191

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See detailQuantum Chemistry Lab at Home: A Microsoft Windows Alternative
Olive, Gilles ULg; Riffont, David

in Journal of Chemical Education (2009), 86(5), 567

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See detailThe Synthesis of N-Benzyl-2-azanorbornene via Aqueous Hetero Diels-Alder Reaction
Sauvage, Xavier ULg; Delaude, Lionel ULg

in Journal of Chemical Education (2008), 85(11), 1538-1540

The synthesis of N-benzyl-2-azanorbornene via aqueous hetero Diels-Alder reaction of cyclopentadiene and benzyliminium chloride formed in situ from benzylamine hydrochloride and formaldehyde is described ... [more ▼]

The synthesis of N-benzyl-2-azanorbornene via aqueous hetero Diels-Alder reaction of cyclopentadiene and benzyliminium chloride formed in situ from benzylamine hydrochloride and formaldehyde is described. Characterization of the product was achieved by IR and NMR spectroscopies. The spectral data acquired are thoroughly discussed. Numerous coupling constants were extracted from the 1H NMR spectrum. They provide a valuable material to familiarize students with the different types of proton-proton coupling patterns and their typical ranges. Karplus type correlations served to calculate 3J vicinal coupling constants as a function of dihedral angles. These computational studies involved molecular modeling. Because the synthetic part is rather straightforward and easy to carry out, this experiment is suitable for an introductory laboratory course where it can serve to illustrate the concepts of green chemistry and atom efficiency. Emphasis can also be placed on structural analysis for use within a spectroscopy course even if there is no activity component associated with it. Last but not least, the whole project provides ample materials for an advanced undergraduate laboratory in green chemistry that combines organic synthesis, structural analysis, and theoretical calculations. [less ▲]

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See detailFrench Mnemonics for the Periodic Table
Olive, Gilles ULg; Riffont, David

in Journal of Chemical Education (2008), 85(11), 1489-1490

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See detailThe step-by-step Robinson annulation of chalcone and ethyl acetoacetate - An advanced undergraduate project in organic synthesis and structural analysis
Delaude, Lionel ULg; Grandjean, Jean ULg; Noels, Alfred ULg

in Journal of Chemical Education (2006), 83(8), 1225-1228

The Robinson annulation is a three-step process involving a Michael addition followed by an internal aldol condensation and a dehydration. Under appropriate experimental conditions, it is possible to stop ... [more ▼]

The Robinson annulation is a three-step process involving a Michael addition followed by an internal aldol condensation and a dehydration. Under appropriate experimental conditions, it is possible to stop the reaction after every step and to isolate the three products separately. This feature is particularly attractive in the frame of an organic chemistry course. It allows students to confirm experimentally the validity of the stepwise mechanism and to get a more thorough understanding of the whole process. It also permits them to synthesize a rich set of related molecules that can be compared and characterized through various analytical techniques. Thus, a stoichiometric mixture of chalcone and ethyl acetoacetate was reacted in ethanol. Depending on the quantity of barium hydroxide monohydrate used as catalyst, the reaction time, and the temperature, three different products were obtained. Their full IR, 1H, 13C, COSY, NOESY, and HETCOR NMR spectra are supplied. Examination of the spectroscopic data helps uncover many challenging structural analysis problems. Among them, the diastereoselective formation of chiral centers during the annulation process, the distinction between axial and equatorial substituents on a cyclohexane ring, and the possibility of a keto-enol tautomerism are extensively discussed. [less ▲]

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See detailSolar Photocatalytic Destruction of p-Nitrophenol: A Pedagogical Use of Lab Wastes
Herrera-Melián, J. A.; Doña-Rodríguez, J. M.; Tello Rendón, E. et al

in Journal of Chemical Education (2001), 78(6), 775-777

In this article we propose the destruction of p-nitrophenol wastes obtained in a previous lab experiment, to generate a new lab experiment. The recommended destruction technique is solar TiO2 ... [more ▼]

In this article we propose the destruction of p-nitrophenol wastes obtained in a previous lab experiment, to generate a new lab experiment. The recommended destruction technique is solar TiO2-photocatalysis. When the effects of TiO2 and sunlight are tested separately, a slight decrease of p-nitrophenol is observed; but when TiO2 and sunlight are employed together p-nitrophenol disappears in 1 or 2 h. These experiments do not require sophisticated equipment or special lab training for the students. Groups of students tested different experimental conditions, such as the effect of different light intensities and sources (800-W UV-lamp, sunlight on sunny days, and sunlight on a cloudy day) or the addition of H2O2. p-Nitrophenol is degraded under the three light sources but at different rates. The addition of H2O2 to the TiO2-plus-sunlight system enhances p-nitrophenol degradation kinetics when compared with the TiO2 plus sunlight and H2O2 plus sunlight combinations. [less ▲]

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