Question

IUPAC name of DDT is:
A. -(2,2,2- Trichloroethane -1,1-diyl)bis(4-chlorobenzene)
B. p,p - dichloro diphenyl trichloroethane
C. p,p – dichloro diphenyl trichloro benzene
D. p,p – tetra chloro ethane

Answer 1

Hint: We know that in IUPAC naming the name of the compound is written out with the substituents in alphabetical order followed by the base name. And DDT is dichloro-diphenyl-trichloroethane.

Step by step answer:
IUPAC: International Union of Pure and Applied Chemistry
IUPAC is an acronym for International Union of Pure and Applied Chemistry, which is a globally recognized international chemistry standards organization that has named all the chemical organic substances in a systematic manner.
Dichlorodiphenyltrichloroethane, commonly known as DDT, is a colorless, tasteless, and almost odorless crystalline chemical compound, an organochlorine. Below given is the structure of DDT:

In this compound there are five chlorine atoms. For the IUPAC naming of this compound: First we select the main chain which has the maximum number of carbon atoms (benzene in this compound), then we will see the position of substituent and do their numbering in the order of preference. Here we start numbering the main chain from chloroethane substituent. So, the IUPAC name of this compound is
1, 1’-(2,2,2- trichloroethane-1,1-diyl)bis(4–chlorobenzene).

So, the correct option is “A”.

Note: DDT originally developed as an insecticide, it became infamous for its environmental impacts. And for the IUPAC naming for substituent we 1st do the naming of substituent’s substituent.