Question

The number structural isomers for pentene are:A. 3B. 4C. 5D. 6

Hint- In order to find the number of structural isomers for pentene first we have to understand the term isomers and pentene. Then we will look for all the combinations possible.

Pentene is a compound with five carbon atoms and a double bond. If we break apart the name of the compound, then the structure makes sense. The 'pent-' part means 'five' and refers to the longest chain of five carbon atoms. The “ene” part refers to a double bond somewhere in the molecule. The chemical formula for pentene is: ${C_5}{H_{10}}$ . The most basic five carbon chain will have a chemical formula of: ${C_5}{H_{12}}$ , but as pentene has a double bond, it has two less hydrogen atoms.