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Unformatted text preview: The melting point was also slightly lower than expected, leading me to believe that the product was contaminated, possibly with water. This was due to lack of drying after the rinsing process and there was not enough product left to conduct a second melting point after further drying. The synthesis of B-carboline involves three distinct steps that can be seen here: Based on this arrow-pushing mechanism and the second step where 3M HCl was added, the reaction-coordinate diagram for this step was determined below: Conclusion: From this reaction it can be seen that proper lab techniques are crucial to proficient outcomes. In this reation knowledge of miscibility and acid, base chemistry are key for success. Questions: 1. The ionic product: 2. The initial step leading to each of the products: 3. The role of the HCl in the decarboxylation step is to protonate the product and stabilize the reaction. 4. The expected product:...
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This note was uploaded on 10/08/2010 for the course CHEM 3BL taught by Professor Chunmei during the Spring '08 term at Berkeley.
- Spring '08