Question

What is the product of the hydrogenation of trans-2-pentene?

Answer 1

The hydrogenation of trans-2-pentene can be thought of as the addition of a molecule of hydrogen across its double bond to yield pentane, `"CH"_3"CH"_2"CH"_2"CH"_2"CH"_3`.

Explanation:

The pi bond between the two carbon atoms involved in the double bond is broken as hydrogen atoms form new `"C"-"H"` bonds with each of those carbon atoms.