Answer to Question #165688 in Organic Chemistry for Vee

Question

Draw the products of the following alkyne reactions:

1. Hex-3-yne+H2 with a Lindlar catalyst

2. 4-methylpent-1-yne in a hydrocarbon- oxidation sequence

3. Hex-2-yne + two equivalents of bromine in CH2Cl2 solvent.

4. 4-methylpent-2-yne with a Li catalyst in ammonia

5. Hex-1-yne un a mercury (II) catalyzed hydration

Answer 1

The reduction of 3-hexyne with H2/Lindlar's catalyst gives predominantly