How will you convert: 1. Propyne into propanone? 2. Secondary butyl bromide into but-2-ene?

1. HC -CH_3+H_2O H_2SO_4 _Propyne _2=C-CH_3 _3-C-CH_3 | || OH O _ Acetone (or propanone) 2. CH_3-CH-CH_2-CH_3+KOH(alc.) | Br _ Sec. butyl bromide _(2-Bromobutane) _3-CH=CH-CH_3+KBr+H_2O _ But-2-ene

How will you convert: 1. Propyne into propanone? 2. Secondary but…

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Question

How will you convert:

Propyne into propanone?
Secondary butyl bromide into but-2-ene?

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Answer

$\text{HC}\equiv\text{C}-\text{CH}_3+\text{H}_2\text{O}\xrightarrow{\text{H}_2\text{SO}_4}\\ \ \ \ \ \ \ \ \ _\text{Propyne}\\\text{CH}_2=\text{C}-\text{CH}_3\rightleftharpoons\text{CH}_3-\text{C}-\text{CH}_3\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ | \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ ||\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{OH} \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{O}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ _{\text{Acetone (or propanone)}}$
$\text{CH}_3-\text{CH}-\text{CH}_2-\text{CH}_3+\text{KOH(alc.)}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\ \ \ \ \ \ \ \ \ \ \ \ \ \text{Br}\\ \ \ \ \ \ \ \ \ \ _{\text{Sec. butyl bromide}}\\\ \ \ \ \ \ \ \ \ \ _\text{(2-Bromobutane)}\\\text{CH}_3-\text{CH}=\text{CH}-\text{CH}_3+\text{KBr}+\text{H}_2\text{O}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ _{\text{But-2-ene}}$

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