Problems and exercisesReduction Reactions

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1. Diphenylacetylene

Predict the result of the following reactions:

2. Synthesis of a pheromone

How would you prepare (Z)-tricos-9-ene, CH₃(CH₂)₇CH=CH(CH₂)₁₂CH₃, the sex pheromone of the housefly, from an alkyne?

3. Why does it stop?

Why does hydrogenation with the Lindlar catalyst stop at the alkene and not go on to the alkane?

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