Ncert Exercises & Solutions

Complete the following reaction sequence.

$0$
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$C H_{3} — C — C H_{3} \to_{(i i) H_{2} 0}^{(i) C H_{3} M g B r} [A] \to_{E t h e r}^{N a m e t a l} [B] \overset{c H_{3} — B r}{\to} [C]$

The complete chemical transformation can be shown as

O O H

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C H_{3} — C — C H_{3} \to_{(i i) H_{2} O}^{(i) C H_{3} M g / B r} \overset{1}{C} H_{3} —^{2} C — C H_{3} \to_{E t h e r}^{N a m e t a l} C H_{3} — C — C H_{3}

p r o p a n o n e | |

^{3} C H_{3} C H_{3}

[A] [B]

2 - m e t h y l p r o p a n e - 2 - o l S o d i u m l e r t - b u t o x i d e

O C H_{3}

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\to (W i l l i a m s o n' s

s y n t h e s i s C H_{3} — B r \overset{1}{C} H_{3} —^{2} C — \overset{3}{C} H_{3}

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C H_{3}

2 - m e t h y l - 2 - m e t h o x y p r o p a n e

[C]

Hence,

O H O^{-} N a^{+} O - C H_{3}

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A = C H_{3} — C — C H_{3}, B = C H_{3} — C — C H_{3}, C = C H_{3} — C — C H_{3}

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C H_{3} C H_{3} C H_{3}