Question

According to IUPAC convention, the systematic name of the compound given below is:

• A. 1-(3-chlorocyclohexyl)-4-(4-bromocyclohexyl)-2-fluorocyclohexane
• B. 5-(4-chlorocyclohexyl)-2-(3-bromocyclohexyl)-1-fluorocyclohexane
• C. 4-(4-bromocyclohexyl)-1-(3-chlorocyclohexyl)-2-fluorocyclohexane
• D. 1-(4-bromocyclohexyl)-4-(3-chlorocyclohexyl)-3-fluorocyclohexane

Answer 1

The correct option is C 4-(4-bromocyclohexyl)-1-(3-chlorocyclohexyl)-2-fluorocyclohexane

Either of the rings as base chain will have the same number of carbon atoms. Hence, we have to pick that base chain which has maximum number of substituents i.e. the middle cyclohexane ring. Then assigning least locants based on the alphabetical preference, we can say that the IUPAC name will be 4-(4-bromocyclohexyl)-1-(3-chlorocyclohexyl)-2-fluorocyclohexane