Question

Account for the following
(i) Aniline gets coloured on standing in air for a long time
(1) MeNH2, is stronger base than MeOH
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Answer 1

(1) The electron density on aniline increases due to +R (electron donating) effect of −NH 2group and due to high electron density aniline gets readily oxidised in air to give colour products. That's why aniline gets coloured on standing in air for a long time.

(2) Nitrogen is less electronegative than oxygen therefore lone pair of electrons on nitrogen is readily available for donation. Hence, MeNH2 is more basic than MeOH.