Question

Write the IUPAC name of the compound:

Answer 1

IUPAC (International Union of Pure and Applied Chemistry) is a method used for the naming of the organic compounds. In this, the functional groups present should number first.

Complete answer:
IUPAC is used for the naming of the organic chemical compounds and their structures. Every organic compound named from their structural formula.
To proceed for the answer first we have to know about the rules of the IUPAC nomenclature:
First select the longest chain of carbon present in the given compound and it is called the parent chain of an organic compound.
Then, name the carbon atoms according to the number of carbon atoms present. Give first priority to the functional group that is attached to a carbon atom.
In the question two functional groups are present i.e., hydroxy and ketone groups. Ketones have higher priority than alcohol. So, numbering starts from the ketone side.
Name the compound according to the number of carbon present. Like in this case five carbon present so it should be pentane.

The IUPAC of the given compound is 4 hydroxy-pentan-2-one. The molecular formula is ${C_5}{H_{10}}{O_2}$

Note:
The important points to be noted that just remember we have to first identify the longest chain of carbon in the given compound. Then, the functional group attached to the carbon should be number first while writing the name of the structure. Also, remember which of the functional groups should be given priority to start the numbering.