Answer : The name of the given molecule is 2-butene or but-2-ene
Explanation :
Step 1 : Find the longest carbon chain.
The longest carbon chain for the given structure contains 4 carbons.
This will help us to find out the prefix for our parent compound.
The alkane with 4 carbons is "Butane"
Therefore our parent compound will have the prefix is "but"
Step 2 : Find the functional group
The functional group is the group that gives specific characteristics to the compound. In this case, we have a double bond in the structure which behaves as a functional group.
Therefore the functional group here is "Alkene"
Functional groups helps us to find the suffix of the name. In this case it is "ene"
Therefore our parent compound is but+ene = butene
Step 3 : Find the position of the double bond
The double bond is present between second and third carbon atom.
We always select the lower number to denote the position of the bond.
So we have 2-butene OR but-2-ene
There are no substituents present in this compound.
Therefore the name of the compound is 2-butene or But-2-ene
