1.

The increasing basicity order of the following compounds is : (a) CH_3CH_2CH_2""(B)CH_3CH_2overset(CH_2CH_3)overset(|)(NH) H_(3)C-overset(CH_3)overset(|)N-CH_3""Ph-overset(CH_3)overset(|)(N)-H

Answer»

(A) lt (B) lt (D) lt (C )
(A) lt (B) lt(C ) lt (D)
(D) lt (C ) lt (A) lt (B)
(D) lt (C ) lt (B) lt (A)

Solution :For `Ph=overset(CH_(2))overset("|")"N "-H`, lone pair of N is involved in resonance, so it is LEAST basic
`CH_(3)CH_(2)NH_(2)""pK_(b)=3.29`
`{:(CH_(3)CH_(2)-NH""pK_(b)=3.00),("|"),(""CH_(2)CH_(3)):}`
`H_(3)C-UNDERSET(CH_(3))underset("|")"N "-CH_(3)""pK_(b)=4.22`


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