Question

Select the correct IUPAC name of the following structure:

• A. 1,2-diethyl-3-propencyclohexane
• B. 1,2-diethyl-4-propylidenecyclohexane
• C. 1, 2-diethyl-4-ethylidenecyclohexane
• D. 3.4-diethyl-1-ethylidenecyclohexane

Answer 1

The correct option is C 1, 2-diethyl-4-ethylidenecyclohexane

Alkylidene group is attached to cyclohexane here is ethylidene.
Ring is the parent chain here.
Naming of substituents is done in alphabetical order as shown ;