Question

According to IUPAC, what is the systematic name of the compound shown below?

• A. $\text{2,5,6-Triethyl-1,3,4-trimethylcyclohexane}$
• B. $\text{1,2,5-Triethyl-3,4,6-trimethylcyclohexane}$
• C. $\text{1,3,4-Triethyl-2,5,6-trimethylcyclohexane}$
• D. $\text{1,2,4-Triethyl-3,5,6-trimethylcyclohexane}$

Answer 1

The correct option is D $\text{1,2,4-Triethyl-3,5,6-trimethylcyclohexane}$

Same number series 1, 2, 3, 4, 5, 6 is obtained starting from any carbon of the ring. Hence, numbering is done giving preference to the ethyl group which comes before methyl group in alphabetical order.