Question

Give the IUPAC name of the following compound ${\left({\mathrm{CCl}}_3\right)}_3\mathrm{CCl}$?

Answer 1

IUPAC naming rules:

• Assign the number to the Carbon atom of the longest chain such that the substituents receive the lowest possible number(lowest locant rule).
• The name should be in alphabetical order and the first letter should be in capital letters.
• Two numbers should be separated by a comma(,) and letters should be separated by a hyphen(-).
• If identical substituents are present then use di, tri, tetra.. however, it is never considered for alphabetical order in final naming.
• If two substituents are in the equivalent position, the lower number is given to the one coming first in the alphabetical listing(If Ethyl and Methyl are present then the lowest number will give to Ethyl)

The naming of the compound ${\left({\mathrm{CCl}}_3\right)}_3\mathrm{CCl}$:

• Assign the number to the Carbon atom of the longest chain.

• The second Carbon atom has the substituent Tricholoromethyl$\left({\mathrm{CCl}}_3\right)$ and Chlorine.
• The first and third Carbon atom contains three Chlorine atom each.
• Therefore, the name of the compound ${\left({\mathrm{CCl}}_3\right)}_3\mathrm{CCl}$ is 2 – (Tricholoromethyl) – 1,1,1,2,3,3,3 – heptachloropropone.