1.

In chlorobenzene solutions, the basic strength of amines increases in the order

Answer»

` (C_(2)H_(5))_(3)N lt (C_(2)H_(5))_(2)NH lt C_(2)H_(5)NH_(2)`
`C_(2)H_(5)NH_(2)lt (C_(2)H_(5))_(2)NHlt (C_(2)H_(5))_(3)N`
`(C_(2)H_(5))_(2)NHltC_(2)H_(5)NH_(2)lt (C_(2)H_(2))_(3)N`
`(C_(2)H_(5))Nlt C_(2)H_(5)NH_(2)lt (C_(2)H_(5))_(2)NH`

Solution :TN non-aqueous solvents, the basicity of amines does not DEPEND upon the stability o f conjugate ACIDS since H-bonding cannot occur. INSTEAD, it DEPENDS only on the +/-effect of the alkyl groups. Obviously, as the number of alkyl groups increases, the basicity increases. in the same order, i.e.,
`C_(2)H_(5)NH_(2) lt (C_(2)H_(5))_(2)NHlt (C_(2)H_(5))_(3)N `


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