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Question

Chemistry Question on Chemical Reactions

HBr reacts with CH2=CHOCH3CH_{2} =CH-OCH_{3} under anhydrous conditions at room temperature to give:

A

CH3CHOandCH3BrCH_{3} CHO and CH_{3} Br

B

BrCH2CHOandCH3OHBrCH_{2} CHO and CH_{3}OH

C

BrCH2CH2OCH3BrCH_{2}- CH_{2}-OCH_{3}

D

H3CCHBrOCH3H_{3}C-CHBr-OCH_{3}

Answer

H3CCHBrOCH3H_{3}C-CHBr-OCH_{3}

Explanation

Solution

First protonation occurs, two possible intermediates are (-1effect destabilizes carbocation) (+M effect stabilizes carbocation) II, is more favourable Hence, BrΘBr^{\Theta} attacks, and product is