A) Rosenmund reduction
B) Etard reaction
C) Cannizaro reaction
D) Friedel-Craft reaction
Correct Answer: D
Solution :
(i) By Rosenmund reduction aldehydes are formed. \[\underset{acid\,\,chloride}{\mathop{R-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-Cl}}\,+{{H}_{2}}\xrightarrow[Boiling\,\,xylene]{Pd,\,\,BaS{{O}_{4}},\,\,S}\] \[\underset{aldehyde}{\mathop{R-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-H+HCl}}\,\] (ii) By Etard reaction, benzaldehyde is formed. (iii) By cannizaro reaction, alcohols and salts of carboxylic acids are formed. \[\underset{formaldehyde}{\mathop{2H-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-H}}\,\xrightarrow{NaOH(aq)}\underset{methyl\,\,alcohol}{\mathop{C{{H}_{3}}-OH}}\,\] \[\underset{sod.\,\,formate}{\mathop{H-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-ONa}}\,\] (iv) By Friedel-Crafts acyladon, aromatic ketones are formed.You need to login to perform this action.
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