JEE Main202431 Jan 2024Morning ShiftChemistryGeneral Organic ChemistryActual
Given below are two statements: Statement I: IUPAC name of HO - CH 2 - ( CH 2 ) 3 - CH 2 - COCH 3 is 7 -hydroxyheptan- 2 -one. Statement II: 2 -oxoheptan- 7 -ol is the correct IUPAC name for the above compound. In the light of the above statements, Choose the most appropriate answer from the options given below:
Options
- AStatement I is correct but Statement II is incorrect.
- BBoth Statement I and Statement II are incorrect.
- CBoth Statement I and Statement II are correct.
- DStatement I is incorrect but Statement II is correct.
Correct answer
A. Statement I is correct but Statement II is incorrect.
Step-by-step solution
Rule 1 :- The longest chain in the molecule will be the parent chain. So, the first thing one should do is to find the longest carbon chain in the molecule. Rule 2 :- Find out all the substituents present on the carbon chain. It can be any- from methyl to any alcohol substituent. Rule 3 :- Start numbering the parent chain from the end such that the substituent gets the lowest number. This is called the lowest locant rule. Rule 4 :- If the substituent occurs more than one time, then the prefix di, tri or tetra is be