Correct IUPAC name for `H_(3)C- underset(underset(C_(2)H_(5))(|))(CH)- underset(underset(C_(2)H_(5))(|))(CH)-CH_(3)` is ……..

Options

A. 2-ethyl-3-methylpentane
B. 3, 4-dimethylhexane
C. 2 sec-butylbutane
D. 2, 3-dimethylbutane

Answer

B

Explanation

Given structure is written in longest simple carbon chain is as under:
`overset(1)(C )H_(3)- overset(2)(C )H_(2) - underset(underset(CH_(3))(|))overset(3)(CH)-underset(underset(CH_(3))(|))overset(4)(CH)-overset(5)(CH_(2))-overset(6)(CH_(3))`
Two methyl substitutes are present so it is dimethyl and their positin is on `3^(rd) and 4^(th)` carbon `therefore` Name is 3, 4-dimethylhexane