1.

CH_(3)-CH_(2)C-=Noverset(x)CH_(3)CH_(2)CHO. The compound X is

Answer»

`SnCl_(2)//HCL//H_(2)O`, boil
`H_(2)//Pd-BaSO_(4)`
`LiAIH_(4)//`ehter
`NaBH_(4)//"ether"//H_(3)O^(+)`

Solution :It is Stephen's reaction,
`CH_(3)CH_(2)C-=Noverset(HCl)rarr[CH_(3)CH_(2)C-=NH]^(+)Cl^(-)`
`overset(SnCl_(2)//HCl)rarr[CH_(3)-CH_(2)CH=NH_(2)]^(+)SnCl_(6)^(2-)`
`overset(H_(2)O //"Boil")rarrCH_(3)CH_(2)CHO+NH_(4)Cl`


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