IUPAC NAME
The IUPAC name of the compound is 2-petene.
There are 5 carbons in the chain, so the parent would be pentane.
But notice the double bond between the second and the third carbon atom (we will start the position on the right). We will get the carbon atom that is the starting point of the double bond. We will also use -ene as the suffix because it is a double bonded hydrocarbon.
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