Write structures for each of the following compounds. Why are the given names incorrect? Write correct IUPAC names.
(i) 2-Ethylpentane
(ii) 5-Ethyl – 3-methylheptane

Explanation

`{:(7 " "6 " "5 " "4 " "3 " "2 " "1), (CH _(3) - CH _(2) - underset( CH _(3)) underset(|) (CH) - CH _(2) - underset(C _(2) H _(5)) underset(|) (CH) - CH _(2) - CH _(3)):}`
Numbering is to be started from the end which gives lower number to ethyl group Hence, correct name is 3- enthyl-4- methylheptane.