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Which of the following species behave bo...

Which of the following species behave both as a nucleophile and an electrophile?
(i) `CH_(3)C=N:` , (ii) `CH_(4)`
(iii) `H_(2)C=O` , (iv) `H_(2)`

A

(ii), (iii)

B

(i), (ii)

C

(iii), (iv)

D

(ii), (iv)

Text Solution

Verified by Experts

The correct Answer is:
A
`CH_(3)CN` and `H_(2)CO` at as both nucleophilic and electrophilic because `C` atom in each of these species is pibonded to highly electronegative atom, `N` and `O`, respectively. Being partially positively charged, `C` is an electrophilic site. On the other hand, the electronegative `N adn O` atoms having unshared `e^(-)` pairs are nucleophilic sites.
`CH_(4) and H_(2)` are neither nucleophilic nor electrophilic.
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