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Question

From the following pairs, which has the first structure more contributing toward resonance hybrid than the second?

A
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B
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C
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D
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Solution

The correct options are
B
C

Major contributor must have (in the following order of prefrence):
(i) Most atoms with complete octets.
(ii) Maximum number of covalent bonds.
(iii) The smallest number of formal charges.
(iv) Any formal charges on the atoms must be able to accommodate them.


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