Which nomenclature is not acording to IUPAC system ?

Options

A. `underset("4-Bromo-2, 4-dimethylhexane")(CH_(3)-CH_(2)-overset(CH_(3))overset(|)underset(Br)underset(|)CH-CH_(2)-underset(CH_(3))underset(|)CHCH_(3))`
B.
C. `underset("5-Oxohexanoic acid")(CH_(3)-underset(O)underset(||)C)-CH_(2)-CH_(2)-CH_(2)COOH`
D. `underset("1-Bromoprop-2-ene")underset()(Br-CH_(2)-CH=CH_(2))`

Answer

D

Explanation

According to IUP AC system of nomenclature, preference is to be given to multiple bonds over halogen substituent, hence correct name of
`Br-overset(3)CH_(2)-overset(2)CH=overset(1)CH_(2)` is 3-bromoprop-1-ene.