Question

This question carries 3 marks. class 11 CBSE​

Answer 1

1.(a)Hyperconjugation effect is a permanent effect in which localization of σ electrons of C-H bond of an alkyl group directly attached to an atom of the unsaturated system or to an atom with an unshared p orbital takes place.

From the above figure, we observe that one of the three C-H bonds of the methyl group can align in the plane of the empty p orbital and the electrons constituting the C-H bond in a plane with this p orbital can then be delocalized into the empty p orbital.

Refer to img.(i)

(b) A nucleophile is a molecule that forms a bond with its reaction partner (the electrophile) by donating both electrons for that bond. Nucleophiles are Lewis bases. Hydroxide is an example of nucleophile that adds to carbon dioxide.

2. The resonance structures of CH3COO- are [refer to img.(ii)]:

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