Question

The IUPAC name of the given structure is:

A.3, 3 - dimethyl pentane
B.3, 3 - diethyl pentane
C.3 – ethyl – 3 methyl
D.3 - ethyl - 3 ethyl pentane

Answer 1

Hint: To answer this question, you should recall the concept of IUPAC nomenclature of IUPAC compounds. The IUPAC system rose to the necessity for a systematic approach due to the sheer quantity of discoveries of organic compounds which made the vernacular nomenclature of organic compounds highly inconvenient. The longest carbon chain will always be the parent chain. The substituents attached are numbered such that they receive the lowest number possible.

Complete Step by step solution:
A set of rules has been formulated by IUPAC for a systematic approach for the nomenclature of organic compounds which has been revised from time to time. Any IUPAC name of the given organic compound consists of three parts of the name which are: parent name, prefix and suffix.
The longest continuous chain has 5 C atoms. On numbering the carbon atoms in the parent chain, the substituents are present on the third carbon atom from both the sides. Two ethyl substituents are present on the third C atom.
Hence, the IUPAC name of the given structure is 3, 3 - diethyl pentane.

Hence, the correct option is B.

Note: According to the Guidelines set by IUPAC, the nomenclature of compounds must follow these steps:
1.The Longest Chain Rule
2.The Lowest Set of Locants: Numbering of parent chains in which the lowest number is assigned to the carbon atom which carries the substituents.
3.Multiple instances of the same substituent
4.The naming of different substituents
5.Correct naming of different substituents in case they are present at the same positions
6.Naming Complex Substituents
For nomenclature purposes all compounds containing carbon as the main principle element qualify to be termed as an organic compound. Other elements like oxygen, hydrogen and nitrogen are the three elements usually associated with carbon to form the system of functional or characteristics groups