Question

Provide the systematic name of the compound shown:

A. 4-butyl-2-ethyl-1-methyl cycloheptane
B. 1-butyl-4-ethyl-3-methyl cycloheptane
C. 2-butyl-4-ethyl-1-methyl cycloheptane
D. 4-butyl-1-ethyl-2-methyl cycloheptane

Answer 1

IUPAC gives us some rules for the naming of organic compounds which can also be referred to as nomenclature of organic compounds. IUPAC stands for International Union of Pure and Applied Chemistry.

Complete answer:
IUPAC nomenclature gives us information about writing the name of chemical compounds. There are some general rules for it. To write the name of this compound we have to follow some rules.
a. At first select the longest chain of carbon atoms, in the given compound ring is there so the compound is said to be ring type structure having seven carbon atoms ring is known as cycloheptane now the preference to the other will according to their length.
b. Now here three different groups are attached known by the name butyl, ethyl and methyl and the numbering should be done according to their preference.
c. Now we can see that at 1st preference should be given to that group which contains more number of carbon atoms which is butyl then numbering starts from the butyl group then 2nd will be methyl and 3rd will be ethyl according to the concept.
d. The systematic name according to this will be 1-butyl-4-ethyl-3-methyl cycloheptane

Hence option B is the correct answer.

Note:
The main aim of the nomenclature IUPAC is to create an international standard for designating compounds to promote communication. The purpose of the system is to give a unique and unambiguous name to each structure so that no two structure names get mixed or they can be identified easily.