Question

(ii) Bromomethane to propanone​

Answer 1

Answer:

Convert : Bromomethane to Propanone

Explanation:

• Step 1: Converting bromomethane to methyl magnesium bromide. When bromomethane is reacted with magnesium metal in the presence of anhydrous ether, it results in the formation of methyl magnesium bromide.
• Step 2: Converting methyl magnesium bromide to propan-2-ol. ...
• Step 3: Converting propan-2-ol to propanone.

Answer 2

Answer:

Bromomethane to Propanone is a multistep conversion.

1.  Conversion of bromomethane to methylnitrile:  

\mathrm{CH}_{3}-\mathrm{Br}+\mathrm{KCN} \rightarrow \mathrm{CH}_{3} \mathrm{CN}+\mathrm{KBr}CH3−Br+KCN→CH3CN+KBr

2.  Conversion of methylnitrile to acetic acid:

\mathrm{CH}_{3}-\mathrm{CN}+\mathrm{H} 2 \mathrm{O} \rightarrow \mathrm{CH}_{3}-\mathrm{COOH}CH3−CN+H2O→CH3−COOH

3.  Formation of calcium salt of acetic acid:

2 \mathrm{CH}_{3}-\mathrm{COOH}+\mathrm{Ca}(\mathrm{OH})_{2} \rightarrow\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{Ca}+2 \mathrm{H}_{2} \mathrm{O}2CH3−COOH+Ca(OH)2→(CH3COO)2Ca+2H2O

4.  Conversion of calcium acetate to acetone by dry distillation for forms acetone as final product:  

\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2} \mathrm{Ca}+\text { Heating } \rightarrow \mathrm{CH}_{3}-\mathrm{CO}-\mathrm{CH}_{3}+\mathrm{CaCO}_{3}(CH3COO)2Ca+ Heating →CH3−CO−CH3+CaCO3

This is the conversion of Bromomethane to propanone.  

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