Question

Which of the following represents the correct IUPAC name of the compound $C{H}_2=CH-C{H}_{2}Cl$?

• A. Allyl chloride
• B. 1-Chloro-3-propene
• C. 3-Chloro-1-propene
• D. Vinyl chloride

Answer 1

The correct option is C 3-Chloro-1-propene

Following steps are followed in naming the compound; $C{H}_2=CH-C{H}_2-Cl$

i) The parent chain consists of 3 carbon atoms, thus the root word; -prop is used.

ii) It is an unsaturated hydrocarbon with a double bond, thus the suffix; -ene is used.

iii) Chloro is used as a prefix for the halogen(chlorine) present as a substituent.

iii) Numbering is done from left to right as a double bond is assigned the lowest number.

Thus the name of the compound is; 3-Chloro-1-propene.