Question

worksheet torcyclohexene" 1. Why do we use H3PO4 instead of H2SO4 as a catalyst for the synthesis of cyclohexene? (2 pts.) 2. Why do we use H3PO4 instead of HCl as a catalyst for the synthesis of cyclohexene? (3 pts.) 3. What alkeneſs) would be produced on dehydration of each of the following alcohols? If more than one product is possible, use Zaitsev's rule to predict which product would be formed in greater amounts. (9 pts.) Hz a) 2-methylcyclohexanol bi 2,2-dimethylcyclohexanol Ht ,CH GH c) 1,2-cyclohexanediol OH + T? 4. In the process of the purification of cyclohexene, we used a saturated NaCl solution to wash the crude product instead of the same volume of pure water. Explain why. (3 pts.) San

Answer 1

1. H2SO4 acts as strong oxidizing agent in addition to as dehydrating reagent hence H3PO4 is better reagent for dehydration of alcohol and it is dafer over H2SO4.

3. Sicne HCl causes the formation of dubstisubst product instead elimination product.

4. To remove the the formed water as salting out.

09 on Lot Masoy + m2 Major Trace OH Nzsoy, T U + 12