Question

What is the IUPAC name of the following compound?

(a) 2-Propylprop-1-ene

(b) 2,3-Dimethylbut-1-ene

(c) 2,4-Dimethylbut-1-ene

(d) 1,3-Dimethylbut-2-ene

The question was asked during an internship interview.

My question is from Haloalkanes Nomenclature in portion Haloalkanes and Haloarenes of Chemistry – Class 12

Answer 1

Correct option is (b) 2,3-Dimethylbut-1-ene

The best I can explain: The parent carbon chain must include the double bond, so there are 4 C atoms including the C-C double bond and the double bond is present at C-1 with two methyl groups at positions 2 and 3.