Give IUPAC names for the following hydrocarbons :

(e) `CH_3 -underset(CH_3)underset(|)(CH) -CH_2-CH_2 - underset(CH_3)underset(|)(CH)- underset(CH_3)underset(|)(CH)-CH_2-C H_3`

Explanation

The structure may be written as
(a)
The longest chain has 6 carbon atoms and is numbered from lowest left as shown. The two side chains are methyl groups at positions 3 and 4 (from both ends). The name of the compound is 3,4-Dimethylhexane.
(b)
The longest chain contains 9 carbon atoms. The chain is numbered from lower right to upper left as shown. The side chains are two ethyl groups at positions 4 and 5 and one methyl group at position 5. The name of the compound is : 4,5-Diethyl-5-methylnonane
(c )
Methyl group is attached to cyclopentane ring. Thus, the name of the molecule is: Methylcyclopentane.
(d)
There are three ethyl groups on cyclohexane ring at positions 1, 3 and 5. Thus, the name of molecule is 1, 3, 5-Triethylcyclohexane.
`overset(1)(C) H_3 overset(2)underset(underset(CH_3)|) (C) H - overset(3)(C) H_2 - overset(4)(C) H_2 - overset(5)underset(underset(CH_3)|)(C)H- overset(6)underset(underset(CH_3)|)(C) H - overset(7) (C) H_2 - overset(8) (C) H_3`
The longest chain contains 8 carbon atoms. The numbering from left to right gives lowest numbers to the substituents. The name of the compound is 2,5,6-Trimethyloctane.