Question

CH3−CH2−CH=CH2
The IUPAC name of the following compound is .

• A. Butane
• B. But-2-ene
• C. 1-Butene

Answer 1

The correct option is C 1-Butene

Now, you can easily find out the word root.

4 carbons $\Rightarrow$word root = but

Assign numbers to carbon chain so that double bond gets the least number.

Therefore,1-Butene