Question

A compound $C_6{H}_{14}{O}_2$ has two tertiary alcoholic groups. The IUPAC name of compound is:

• A. 2,3 - dimethyl - 1,2 - butanediol
• B. 3,3 - dimethyl - 1,2 - butanediol
• C. 2,3 - dimethyl - 2,3 - butanediol
• D. 2 - methyl - 2,3 - pentanediol

Answer 1

The correct option is C 2,3 - dimethyl - 2,3 - butanediol

$C_6{H}_{14}{O}_2$ with two tertiaryy alcoholic groups possible has the following structure and using the IUPAC nomenclature its name is:

Steps to name an organic molecule:

1. Identify the fuctional group: OH in the given molecule. two Alcoholic group i.e suffix "diol" will come.

2. Identify parent chain: The longest carbon chain that contains the functional group. Here its 4 C chain i.e butane

3. Assign locant number: lowest number to the main functional group and side chains i.e. 2,3-diol and 2,3-dimethyl

4. Identify side chains/groups: two methyl groups.

IUPAC name is: 2,3-dimethyl-2,3-butanediol or 2,3-dimethylbutane-2,3-diol.