Question

Name the following compounds according to IUPAC system-

Answer 1

The IUPAC nomenclature is a chemical nomenclature which is used for the naming of organic compounds by following some rules and regulations. And it is proposed by the International Union of Pure and Applied Chemistry. For solving an IUPAC name, first we have to identify the longest carbon chain present in the molecule and look if any functional is there or any branched chain is there or not. After that, conclude the name into a single word.

Complete answer:
The IUPAC name of the given compound is $2 -$bromo$- 3 -$methylbut$- 2 -$en$- 1 -$ol. Here, the longest chain present in the compound is a chain with four carbon atoms and the chain contains one double bond. Hence, the name should contain butane. A bromine is present in the second carbon of the longest chain and one methyl group is present in the third carbon atom. Therefore, the IUPAC name should start like $2 -$bromo$- 3 -$methyl. And one hydroxy (-OH) group is present on the first carbon atom. Thus, the name should contain the suffix –ol. Hence, the IUPAC name of the given compound is $2 -$bromo$- 3 -$methylbut$- 2 -$en$- 1 -$ol.

Note:
As we know that the IUPAC nomenclature is used for the naming of organic compounds. For that, first we have to identify the longest continuous carbon chain present in the parent compound and find out the group linked to this longest chain. The name is different for each functional group. For example, if the acid group is present in the compound, the suffix should be ‘-oate’. Like that, we are naming an organic compound.