Question

What is the IUPAC name of the given compound?

1) 4-ethyl-2-isopropyl-1-methylcycloheptane
2) 2-ethyl-4-isopropyl-1-methylcycloheptane
3) 1-ethyl-2-isopropyl-4-methylcycloheptane
4) 1-ethyl-4-isopropyl-2-methylcycloheptane

Answer 1

Using IUPAC naming rules, we identify that 1-ethyl-4-isopropyl-2-methylcycloheptane is the closest to correct naming, although none of the provided options exactly match the proper IUPAC name following the guidelines. The correct answer is 4)-ethyl-4-isopropyl-2-methylcycloheptane

Step-by-step explanation:

The correct IUPAC name for the given compound is determined by following IUPAC naming rules, which involve identifying the longest carbon chain in the cyclic structure, numbering the substituents to give the lowest possible numbers, and listing the substituents in alphabetical order. The compound has a seven-membered ring, which is cycloheptane as the parent structure. Substituents are an ethyl group, an isopropyl group, and a methyl group.

To determine the correct name from the options provided, we number the substituents so that the one that comes first in the alphabet (ethyl) gets the lowest possible number. Starting at the ethyl group and numbering counterclockwise, we would get 1-ethyl-4-isopropyl-2-methylcycloheptane. Following the rules correctly would not yield any of the options exactly as given, suggesting there might be an error in the list of options provided. However, the option that comes closest to proper IUPAC naming rules is option 4. The correct answer is 4)-ethyl-4-isopropyl-2-methylcycloheptane