Explain Stephen's reduction with an example. 

Explanation

Stephan.s reduction: Nitriles on reduction with stannous chloride and hydrochloria acid gives imine hydro chloride which on hydrolysis gives corresponding aldehyde. This reaction is called Stephan.s reduction.
`SnCl_(2)+2HCl rarr SnCl_(2)+2[H]`
`underset("(Nitrate)")(R-C-=N+2[H])overset(SnCl_(2)+"Conc. HCl")underset("Ether")rarr underset("(imine)")(R-CH=NH+HCl overset(H_(2), "boil")rarr underset("(aldehyde)")(R-overset(O)overset(||)C-H+NH_(4)Cl)`
Example
`underset("(Ethane Nitrate)")(CH_(3)-C-=N+2[H])overset(SnCl_(2)+"Conc. HCl")underset(290K)rarr underset("(Acetaldimine hydrochloride)")(CH_(3)CH=NH+HCl)overset(H_(3)O" boil")rarr underset("(Acetaldehyde)")(CH_(3)-overset(O)overset(||)C-H+NH_(4)Cl)`