Answer :
The IUPAC name of the compound shown is 1-methyl-1-propanethiol.
As per the naming rules set by the International Union of pure and applied chemistry IUPAC, the name of an organic compound is decided by following a certain set of rules.
First you have to select the longest chain which covers all the branches and functional groups. The functional group will decide the suffix of the name of the compound.
In this compound the functional group is thiol.
And a branch of methyl group is present on the compound.
So as per the IUPAC rules the name of this compound will be 1-methyl-1-propanethiol.
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