Question

(b) $h_3c - hc - ch = ch - ch_3$
$\vert$
$ch_3$
spell out the full name of the compound.

Explanation:

Step1: Identify the longest carbon chain with the double bond

The longest chain has 5 carbon atoms.

Step2: Number the chain to give the double bond the lowest number

Start numbering from the left - hand side as it gives the double bond the lower number. The double bond is between C - 3 and C - 4.

Step3: Name the substituents

There is a methyl group at C - 2.

Step4: Combine all parts

The name is 2 - methyl - 3 - pentene.

Answer:

2 - methyl - 3 - pentene