Question

4 Synthesis of lohexene by Dehydration - Pre-Lab Assignment de drated with a strong and high A w a y 's G UPAC 3) Explain why two products are formed from the dehydration of 3-hexanol, but only ONE product is formed from the dehydration of 3-pentanol. (Consider tr a d isomers only, not cis/trans stereoisomers.) 2. In an organic synthesis, reactions are sometimes performed in sequence to convert one functional group into another Complete this multi-step reaction sequence on paper: Court 2-pentanol into 2.3.dibromopane. Draw structures of the starting material (2-pentanol) and final product (2,3-dibromopentane), and show the no reactions needed for this synthesis. Be sure to include the structure of the intermediate compound, and the reagents and conditions for each reaction. Finally, explain why 1.2.dibromopentane would nor be a significant product of this synthesis. Ngo

Answer 1

5 3 2 equivale "OH :0 + Peuth b 2 4 J csame) 4 3- Pentanol, Pent-2-ene] n Ta x-Bene Hex-2-ene Hexan-3-01

C) in case of 3-Pentanol, the 2 alkenes formed are equivalent, they are same.

while in case of hexan-3-ol, Proton can be removed from two positions, which are different A and B.

consequently giving two different alkenes, that is, Hex-2-ene & Hex-3-ene as depicted through the mechanism.