The intramolecular delocalisation of \( \pi \) and/non-bonding electrons without any change in the position of atoms is called resonance. Delocalisation may occur in conjugated system involving carbon atom and atom other than the carbon. Delocalisation makes system stable. More is the number of resonating structures, more is the stability of the system. A conjugated structure is least stable when a higher electronegative atom has positive charge and when identical charges are present on adjacent atoms.
_ Examine the structures I and II for nitromethane and choose the statement correctly :
(I)
(II)
- (A) II is less important because electrons have shifted to oxygen
(B) II is less important because nitrogen has sextet of electrons
(C) II is acceptable and important structure
(D) none of these
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