question_answer

The correct sequence of steps involved in the mechanism of Cannizaro’s reaction is

A) nucleophilic attack, transfer of \[{{H}^{-}}\]and transfer of \[{{H}^{+}}\]

B) transfer of \[{{H}^{-}}\], transfer of \[{{H}^{+}}\] and nucleophilic attack

C) transfer if \[{{H}^{+}}\] nucleophilic attack and transfer of \[{{H}^{-}}\]

D) electrophilic attack by \[O{{H}^{-}}\], transfer of\[{{H}^{+}}\] and transfer of \[{{H}^{-}}\]

Correct Answer: A

Solution :

The Cannizaro reaction is as \[HCHO+HCHO\xrightarrow{KOH\,\,(con.)}\underset{methyl\text{ }alcohol}{\mathop{C{{H}_{3}}OH}}\,\]                                                                 \[+\text{ }\underset{acetic\text{ }acid}{\mathop{HCOO{{K}^{+}}}}\,\] The mechanism of Cannizaro reaction is as Step Ist: Attack of nucleophile \[O{{H}^{-}}\] to the carbonyl carbon