Question

CH3 - CH = CH - COCl

What is the IUPAC name of this compound?
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Answer 1

Answer:

Acetyl chloride

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Answer 2

Answer

But 2 - enoyl chloride

Explanation

First of all, since the number of carbon is 4 with a double bond, the main name will be Butene.

Here, the numbering will start from COCl. Starting from COCl, we get the position of double bond as 2, hence, it would be But 2 - ene.

Now, since functional group COCl (acetyl chloride) is present, we will use the suffix -oyl chloride.

Combining all points, we get the IUPAC name as But 2-eneoyl chloride.