Question

Write the IUPAC name of the given compound?

Answer 1

While writing the IUPAC name of a compound. Nomenclature guidelines should be followed in proper order and students should first find out the longest carbon chain and then proceed in writing other details.

Complete step by step answer:
In order to find the IUPAC name of the compound in the question, we need to follow the following steps:
Find the longest chain of carbon atoms. In this question the longest carbon chain consists of three carbon atoms. Hence the base name of the compound is prop.
Numbering of carbon atoms should be done from left to right.
The next step is to determine single covalent bond, double covalent bond and triple covalent bond. In this compound a double covalent bond is present on the 2nd carbon atom hence the suffix will be 2-ene.
Next step is to find any branched element or bond, in this question there is a methyl and bromine bonded in the compound at second carbon and at 3rd carbon atom.
If any halogen group is present then the carbon attached should have the least possible number. The numbering should be done in such a way that halogens attached carbon comes first.
While writing the functional groups alphabetic order to be followed.

**The final name of the compound will be 1-bromo,2-methyl prop-2-ene.

Note: **
While writing the IUPAC name of the compound, students are not able to determine the longest carbon chain, they are not able to do proper numbering of the carbon atoms resulting in the wrong IUPAC name. Hence the IUPAC naming guidelines should be followed properly.