Catalyst \(\mathrm{SnCl}_{2} / \mathrm{HCl}\) is used in which of the following method of synthesis of…
Catalyst \(\mathrm{SnCl}_{2} / \mathrm{HCl}\) is used in which of the following method of synthesis of aldehyde?
Stephen's reduction
Cannizzaro reaction
Clemmensen's reduction
Rosenmund's reduction
Solution
Stephen aldehyde synthesis reaction involves the preparation of aldehydes \((\mathrm{R}-\mathrm{CHO})\) from nitriles \((\mathrm{R}-\mathrm{CN})\) using \(\operatorname{tin}(\mathrm{II})\) chloride \(\left(\mathrm{Sn} \mathrm{Cl}_{2}ight)\), hydrochloric acid \((\mathrm{HCl})\) and quenching the resulting iminium salt ([R\(\left.\mathrm{CH}=\mathrm{NH}_{2}ight]^{+} \mathrm{Cl}^{-}\)) with water \(\left(\mathrm{H}_{2} \mathrm{O}ight)\).