Question

part b
(b) $h_3c - hc - ch = ch - ch_3$
$\underset{ch_3}{|}$
spell out the full name of the compound.
3 - methyl - 2 - pentene
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Explanation:

Step1: Determine the parent chain

The parent chain is the longest carbon chain containing the double bond. Here, it is a 5 - carbon chain (pentene).

Step2: Number the carbon atoms

Number the carbon atoms in the parent chain such that the double bond gets the lowest possible number. The double bond is between carbon - 2 and carbon - 3.

Step3: Locate the substituent

The methyl group is on carbon - 3.

Answer:

3 - methyl - 2 - pentene