Find the reactants which on heating with alcoholic KOH produces the compound CH 3- CH 2- CH 2- CH = CH 2 (i) CH 3- underset overset|BrCH - CH 2- CH 2- CH 3 (ii) CH 3- CH 2- underset overset|BrCH - CH 2- CH 3 (iii) CH 3- CH 2- CH2 - underset overset|BrCH - CH 2Br (iv) CH 3- CH 2- CH 2- CH 2- underset overset|BrCH 2

Question

Find the reactants which on heating with alcoholic KOH produces the compound CH 3- CH 2- CH 2- CH = CH 2 (i) CH 3- underset overset|BrCH - CH 2- CH 2- CH 3 (ii) CH 3- CH 2- underset overset|BrCH - CH 2- CH 3 (iii) CH 3- CH 2- CH2 - underset overset|BrCH - CH 2Br (iv) CH 3- CH 2- CH 2- CH 2- underset overset|BrCH 2 (A) (ii), (iv) (B) (i), (iv) (C) (ii), (iii), (iv) (D) (i), (ii)

Tardigrade Admin · Accepted Answer

On heating haloalkane with alcoholic KOH, gives CH 3 - CH 2- CH 2- CH = CH 2 are: (i) CH 3- underset overset|BrCH - CH 2- CH 2- CH 3 ->[KOH text(alc)][ textElimination]CH 2= CH - CH 2- CH 2- CH 3 [by using Hofmann’s rule]. Hence, the formation of given product is possible. (ii) CH 3- CH 2- underset overset|BrCH - CH 2- CH 3 ->[KOH( textalc)]CH 3- CH = CH - CH 2- CH 3 Hence, the formation of given product is not possible. (iii) CH 3- CH 2- CH2 - underset overset|BrCH - CH 2Br ->[KOH text(alc)][ textElimination]CH 3= CH2 - CH 2- CH - CHBr Hence, the formation of given product is not possible. (iv) CH 3- CH 2- CH 2- CH 2- underset overset|BrCH 2 ->[KOH text(alc)][ textElimination]CH 3= CH2 - CH 2- CH - CH 2 Hence, the formation of given product is possible. Thus, (i) and (iv) are the reactants that can give the given product.