question_answer

Which of the following gives Cannizaro reaction -

A) \[C{{H}_{3}}-C{{H}_{2}}-\underset{\underset{O}{\mathop{\parallel }}\,}{\mathop{C}}\,-H\]

B) \[C{{H}_{3}}-\overset{\overset{O}{\mathop{\parallel }}\,}{\mathop{CH}}\,-C{{H}_{3}}\]

C)

D) \[C{{H}_{3}}-\overset{\overset{C{{H}_{3}}}{\mathop{|}}\,}{\mathop{CH}}\,-\underset{\underset{O}{\mathop{\parallel }}\,}{\mathop{C}}\,-H\]

Correct Answer: D

Solution :

For Cannizaro reaction, \[\alpha \] hydrogen must absent
[a]	[b]
[c]	[d] \[C{{H}_{3}}-\overset{\overset{CH}{\mathop{|}}\,}{\mathop{CH}}\,-\underset{\underset{O}{\mathop{\parallel }}\,}{\mathop{C}}\,-H\]
It is a special case which can give Cannizaro reaction although contain \[\alpha -H\]