Write reactions and conditions for the following conversions : (i) Ethanol to Propanone (ii) Benzoyl chloride to Benzaldehyde (iii) Acetaldehyde to Crotonaldehyde.

Write reactions and conditions for the following conversions : (i) Et

1.	Write reactions and conditions for the following conversions : (i) Ethanol to Propanone (ii) Benzoyl chloride to Benzaldehyde (iii) Acetaldehyde to Crotonaldehyde.
Answer» Solution :Steps involved in the conversions are given below : (i) `underset("Ethanol")(CH_(3)CH_(2)OH) overset(Cu)underset(573 K) to CH_(3) -underset("Ethanol")overset(O)overset(\|\|)C-Hoverset((i)CH_(3)MgBr)underset((ii)H_(2)O//H^(+)) to underset("Propan-2-ol")(CH_(3)-overset(OH)overset(\|)CH-CH_(3) - overset(K_(2)Cr_(2)O_(7))underset(H_(2)SO_(4)"CONC")to CH_(3) -underset("Propanone")(CH_(3)-overset(O)overset(\|\|)C-CH_(3)` (ii) `underset("BENZOYL chloride")(C_(6)H_(5))-overset(O)overset(\|\|)C-Cl + H_(2) overset(Pd-BaSO_(4))to underset("Benzaldehyde")(C_(6)H_(5)-overset(O)overset(\|\|)C-H + HCl` (iii) `2CH_(3) underset("Ethanol")overset(O)overset(\|\|)C-H overset("dil NAOH")to CH_(3) - underset("3-Hydroxybutanol")overset(OH)overset(\|)CH-CH_(2)-overset(O)overset(\|\|)C-H overset("heat")to CH_(3)-CH= underset("Crotonaldehyde")(CH - overset(O)overset(\|\|)C-H)`