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- W91677564 abstract "The concept of chemical reactions is very complex. During our courses of Organic Chemistry at UNAM (Universidad Nacional Autonoma de Mexico, Facultad de Quimica), we try to provide key elements to our undergraduate students of the different factors affecting the rate of the reactions. The use of Microwave in Organic Synthesis has become an important tool for speed reactions. We have developed a new laboratory experiment involving; Microwave, Oxiranes and Amines in order to teach the influence of the electroatracting and electrodonating groups in the rate of reaction in the amino alcohol s formation. Using a CEM Explorer Microwave equipment, changing the power, time of reaction and the nature of the aniline, is possible to explain the influence of the nucleophile nitrogen in the speed of the reactions. Activated (p-methoxyaniline, p-methylaniline), neutral (Aniline), and deactivated (pnitroaniline, p-cyanoaniline) were used with 1,2-epoxybutane. The identification of the products was done using NMR (Nuclear Magnetic Resonance) spectroscopy. These experiments allow us to monitor the % of conversion, and the products obtained. Students perform the experiments in two to three sessions of 3 hrs. Each one, and can obtain very interesting conclusions, about the influence of different factors in the speed of the reactions. Using NMR students can interpret the influence of the electronic configurations in the speed and selectivity of the reaction. The understanding of kinetics and selectivity in a chemical reaction is reinforced with this kind of experiments. The laboratory curricula have been reinforced using a virtual environment to simulate the experiments students are performing. Simulation of the reaction in 3D using semi empirical metros and HF (Hartree Fock) to find the transitions states, are performed and the visualization in a 3D environment, in which the students can visualize the complete pathway of the reactions and study each of the steps involved." @default.
- W91677564 created "2016-06-24" @default.
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- W91677564 date "2012-01-01" @default.
- W91677564 modified "2023-09-26" @default.
- W91677564 title "TEACHING KINETICS OF CHEMICAL REACTIONS" @default.
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