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Introduction,
Discuss the nucleophilic substitution reactions that take place in this experiment.
Explain how the difference in activation energies, and the differences in stability of the product can cause either a kinetic or a thermodynamic product to be produced. What type of reaction conditions or electrophiles will cause one or the other product to be made. What product do you think will be made in this reaction?
Describe how NMR can be used to determine the structure of the product the relative concentrations if more than one product is made. Procedure:
State exactly what was done during the experiment. Results
Provide the following quantities and calculations:
Mass of product, Limiting reagent, Theoretical yield, Percent yield, melting point of product.
State integration, chemical shifts of all peaks or reagions of peaks and Splitting (singlet, triplet, quartet). If there are many peaks jumbled in one area such as in the aromatic region, state the beginning and ending chemical shift, the integration, and call the peak a “multiplet”
Use the areas of the methylene peaks at 4.7 and 3.9 ppm to determine the percent composition of each product for both of the NMR spectra shown in this content area. Provide the average percent composition.
Discussion:
Discuss what the major product was in each case, and why, (thermo vs kinetic) Describe how NMR spectroscopy worked to determine the product concentration. Speculate how the opposite product composition might be obtained. Describe the reaction mechanism for the the two condensation reactions that were done. Predict the product that you would expect in each of the condensation reactions. Procedure:
Describe what was done in each part of the experiment that you worked on. Results:
Theoretical yield and percent yield for the condensation reaction..
Proton spectra of the condensation products.
Propose structures that are consistent with the NMR spectra of each of the reaction
Discuss the nucleophilic substitution reactions that take place in this experiment.
Explain how the difference in activation energies, and the differences in stability of the product can cause either a kinetic or a thermodynamic product to be produced. What type of reaction conditions or electrophiles will cause one or the other product to be made. What product do you think will be made in this reaction?
Describe how NMR can be used to determine the structure of the product the relative concentrations if more than one product is made. Procedure:
State exactly what was done during the experiment. Results
Provide the following quantities and calculations:
Mass of product, Limiting reagent, Theoretical yield, Percent yield, melting point of product.
State integration, chemical shifts of all peaks or reagions of peaks and Splitting (singlet, triplet, quartet). If there are many peaks jumbled in one area such as in the aromatic region, state the beginning and ending chemical shift, the integration, and call the peak a “multiplet”
Use the areas of the methylene peaks at 4.7 and 3.9 ppm to determine the percent composition of each product for both of the NMR spectra shown in this content area. Provide the average percent composition.
Discussion:
Discuss what the major product was in each case, and why, (thermo vs kinetic) Describe how NMR spectroscopy worked to determine the product concentration. Speculate how the opposite product composition might be obtained. Describe the reaction mechanism for the the two condensation reactions that were done. Predict the product that you would expect in each of the condensation reactions. Procedure:
Describe what was done in each part of the experiment that you worked on. Results:
Theoretical yield and percent yield for the condensation reaction..
Proton spectra of the condensation products.
Propose structures that are consistent with the NMR spectra of each of the reaction