Give the IUPAC name of : CH_ 3 CH(Cl)CH(Br)CH_ 3

MHT CET Chemistry question

Give the IUPAC name of : \mathrm{CH_{3}CH(Cl)CH(Br)CH_{3}}

(A)2-Bromo-3-chlorobutaneCorrect
(B)2-Chloro-3-bromobutane
(C)2-Bromo-2-chlorobutane
(D)2-Bromo-3-chloropentane

Answer: (A)

Solution

It is a butane chain with Br and Cl on adjacent carbons C-2 and C-3; the locant set is {2,3} either way so the substituent cited first alphabetically (bromo) gets the lower

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Question ID VK-043257