Question

Write the structure of 2, 3 – dimethylbutane.

Answer 1

Hint: In this question IUPAC name of an organic compound is given. And start making from the parent chain and then substituents.

Complete step by step solution: Given an organic compound is 2, 3 – dimethylbutane.
Here the name of the parent chain is butane which means it has four carbons in the main chain and it has –ane suffix which means all the carbon in the main chain have single bonds.
After that we see the naming of substituents. Here in this question substituent is methyl, where “meth” is a suffix which means there is one carbon in the chain of substituent. In this question dimethyl is used which means substituent is repeated at two positions, as ‘di’ is used for two.

So, for checking the positions of substituents here numbering is given which is 2, 3 which means one substituent is at 2nd carbon and other is on 3rd carbon.
There are many other rules also there for IUPAC naming.
So, from the above explanation we can draw the structure of given IUPAC name 2, 3 – dimethylbutane:

Note: So, the rule of IUPAC naming and drawing structure from IUPAC naming is similar but in simple language we can say they are opposite. Because in IUPAC naming we start naming from the substituent but in the case of drawing structure from IUPAC naming we first see the main chain.