Question

Give the name of the following substituted alkanes:

Answer 1

Hint:In the process of naming an organic compound, according to the IUPAC rules, the carbon chain with the highest number of carbon atoms is chosen as the main chain. The chain attached to the parent chain is added as a prefix.

Complete step by step solution:
In the cyclohexane ring, there are 6 carbon atoms, while in the straight carbon chain there are four carbon atoms. Hence according to the rules of IUPAC nomenclature, the cyclohexane ring should be chosen as the main chain because of the higher number of carbon atoms in it and thus the straight chain butyl group is chosen as the substituent as the butyl group.

So, the IUPAC nomenclature of the compound is: 1-butyl cyclohexane or simply butylcyclohexane.

Note:
Some of the rules for the nomenclature of organic compounds by the International Union of Pure and Applied Chemistry or IUPAC.
The longest chain containing the highest number of carbon atoms needs to be identified first. This carbon chain is called the parent carbon chain.
The second step is the identification of the substituents and the functional groups and assigning the priority to them.
The carbon atoms in the parent chain should be numbered in a way that the main functional group and the substituents get preference first. Among the functional group and the substituent, the main functional should get first priority. If more than one functional group is present then the more priority functional group will be preferred over the less priority one and hence it will become the substituent.