Question

Identify the correct set of reagents or reaction conditions ‘X’ and ‘Y’ in the following set of transformation.

\(CH_3-CH_2 - CH _2 - Br \xrightarrow {'X '} Product \xrightarrow {'Y '} CH_3 -\underset{Br}{\underset{|}{C}}H-CH_3\) 

(1) \(X = conc.alc. NaOH, 80^\circ C, Y = Br_2/CHCl_3\) 

(2) \(X = dil.aq. NaOH, 20 ^\circ C, Y = HBr/acetic \,acid \)

(3) \(X = conc.alc. NaOH, 80^\circ C, Y = HBr/acetic\, acid \)

(4) \(X = dil.aq. NaOH, 20 ^\circ C, Y = Br_2/CHCl_3\)

Answer 1

Correct option is (3) \(X = conc.alc. NaOH, 80^\circ C, Y = HBr/acetic\, acid \)

\(CH_3 - CH_2 - CH _2 - Br \xrightarrow [80 ^\circ C]{X=conc.alc.NaOH}\)

\(CH_3 - CH = CH_2 \xrightarrow {Y≡ HBr/ Acetic\,acid}CH_3 - CH Br - CH_3\)