Answer to Question #92862 in Organic Chemistry for Nour fahes

Question

What would the reaction between phenylacetylene and H2 ( in presence of a catalyst) yield? I want to know the product please

Answer 1

Like in every reaction in organic chemistry products are very dependent on conditions of the reaction.

Here, three different products can be formed depending on catalyst and conditions:

Using Lindlar catalyst (Pd on CaCO₃ poisoned with Pb) the main product will be styrene (1).

Normal Pd/C catalyst will lead to the main product 2 - ethylbenzene.

More severe Pt/C catalyst with increased pressure of H₂ and temperature will result in the product 3 - ethylcyclohexane.

If catalyst and conditions are unknown, most likely ethylbenzene (2) will be formed as a main product.