Question

Name of the given compound is

(A) 5-ethyl-6-methyloctane
(B) 4-ethyl-3-methyloctane
(C) 3-methyl-4-ethyloctane
(D) 2, 3-diethylheptane

Answer 1

Hint: A chemical nomenclature is a set of rules for creating chemical compound systematic names. The world's most common naming characteristics have been developed and established by the Pure and Applied Chemistry International Union (IUPAC). The longest chain is the parent chain and the substituents are written before the parent compound.

Complete step by step solution:
In general, the base part of the name represents the amount of carbon in the parent chain that has been allocated. The name suffix represents the feature group(s) type(s) present on (or within) the parent chain. Other groups connected to the parent chain are known as substituents.
There are 8 carbons in the longest carbon chain.
The methyl group is at C-3 when the counting is performed from the left-hand side, and the ethyl group is at C-4. $ \text{ }3+4=7 $ is the sum of the number of positions.
The number of positions is $ 5+6=11 $ when the counting is done from the right side, the methyl group is at C-6 and the ethyl group is at C-5.
Thus, the number of positions from the left-hand side is less. Numbering is therefore performed from the left side of the hand.
The name, then, is 4-Ethyl-3-methyl octane.
Hence choice C:4-Ethyl-3-methyl octane is the right answer.

Note:
By replacing the suffix -ane with -ene, double bonds in hydrocarbons are indicated. When more than one double bond occurs, a prefix indicating the number of double bonds is shown (-adiene, -atriene, etc.). Triple bonds are called using the suffix -yne in a similar manner. Within the parent chain, the position of the multiple bond(s) is(are) indicated by placing directly in front of the base name the number(s) of the first carbon of the multiple bond(s).