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Oxides of Sulphur

What would be...

Question

What would be the expected product of the reaction of propyne with ${B r}_{2}$ in $H_{2} O$ if the mechanism of this reaction is analogous to that of propene?

2-brompropenol

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Bromoacetone

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2-bromo-2-propanol

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Bromoprophenol

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Solution

The correct option is A Bromoacetone
The above reaction is butyne undergoing bromination in the presence of water. Propyne reacts similarly with bromine in the presence of water. It gives Bromoacetone when propyne undergoes bromination in the presence of water undergoing keto-enol tautomerism.

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Similar questions

2- bromo butane $15 % a q s o l n o f E t O H - ----------- \to P$
In this reaction 70% recemisation takesplace % of inverted product would be:

S_{N} 1

S_{N} 2

B r_{2}

C C l_{4}

F e B r_{3}

S N_{1}

S N_{2}

2

2^{o} R X

N a O H

80

20

S N^{1}

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