First slide

Nomenclature

Question

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

Moderate

A

2, 5, 6-triethyl- 1, 3, 4-trimethyl cyclohexane
B

1, 2, 5-triethyl-3, 4 6-trimethyl cyclohexane
C

1, 3, 4-triethyl-2,5, 6-trimethyl cyclohexane
D

1, 2, 4-triethyl-3, 5, 6-trimethyl cyclohexane

Solution

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.

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