Question

Choose the correct IUPAC name of the following structure:

• A. 3-hex-5-methyl-nonane
• B. 3-propyl-2-methyl-nonane
• C. 5-(1-ethyl-2-methylpropyl)-nonane
• D. 3-isopropylnonane

Answer 1

The correct option is C 5-(1-ethyl-2-methylpropyl)-nonane



Names such as isopropyl, sec-butyl and tert-butyl are acceptable substituent names in the IUPAC system of nomenclature. But systematic substituent names are preferable.

So, 5-(1-ethyl-2-methylpropyl)-nonane or 5-(1-ethyl-1-isopropyl)-nonane are the correct IUPAC names of the above structure.