A) Zn and \[ZnC{{l}_{2}}\]
B) Al powder
C) \[Al{{(O{{C}_{2}}{{H}_{5}})}_{3}}\] and anhydrous \[AlC{{l}_{3}}\]
D) \[FeC{{l}_{3}}\]
Correct Answer: C
Solution :
Tischenko reaction All aldehyde on heating with aluminium alkoxide (ethoxide or isopropoxide) and anhydrous \[AlC{{l}_{3}}\] or \[ZnC{{l}_{2}}\]undergoes an intermolecular oxidation and reduction similar to Cannizaro reaction but the alcohol and acid instead of appearing as such, react to produce esters. \[\underset{acetaldehyde}{\mathop{2C{{H}_{3}}CHO}}\,\xrightarrow[any.\,\,AlC{{l}_{3}}]{Al{{(O{{C}_{2}}{{H}_{5}})}_{3}}}\underset{ethyl\text{ }acetate}{\mathop{C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}}}\,\] \[\underset{benzaldehyde}{\mathop{2{{C}_{6}}{{H}_{5}}CHO}}\,\xrightarrow[any.\,\,AlC{{l}_{3}}]{Al{{(O{{C}_{2}}{{H}_{5}})}_{3}}}\underset{benzyl\text{ }benzoate}{\mathop{{{C}_{6}}{{H}_{5}}C{{H}_{2}}OO.\,{{C}_{6}}{{H}_{5}}}}\,\]
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