Single Choice

Which of the following statement is NOT correct?

AResonance structure is always more stable than the contributing structures
BNone of the resonating structures represents the true structure
CGreater is the resonance energy, the greater will be the stability of the resonance hybrid
DResonance is possible only in the molecules containing multiple bonds
Correct Answer

Solution

Option D is incorrect. The correct statement is Resonance is possible even in the molecules which do not contain multiple bonds. An example includes hyperconjugation. It is the interaction of the electrons in a sigma bond (usually $$C–H$$ or $$C–C$$) with an adjacent empty (or partially filled) non-bonding p-orbital, antibonding σ or π orbital, or filled π orbital, to give an extended molecular orbital that increases the stability of the system.

SIMILAR QUESTIONS

Chemical Bonding

Which of the following is not a feature of resonance?

Chemical Bonding

Which of the following is the correct statement regarding urea?

Chemical Bonding

Explain why each of the following are not resonance forms: $$H_{2}\ddot{N} - O - H $$ and $$H_{2} \ddot{N} = \overset{+}{O} - H $$

Chemical Bonding

State True or False. The reason for resonance is delocalisation of $$\pi$$ -electrons.

Chemical Bonding

The resonating structures of cyanate ion are, $$\underset{(i)}{O=C=N^-}$$ $$\leftrightarrow$$ $$\underset{(ii)}{^-O-C\equiv N}$$ $$\leftrightarrow$$ $$\underset{(iii)}{^+O\equiv C-N^{2-}}$$ The correct set of oxidation states of O, C and N respectively with the most stable structure out of the above is?

Chemical Bonding

Arrange the following resonanting structures of formic acid on order of decreasing stability.

Chemical Bonding

Arrange the following resonating structures of vinyl chloride in order of decreasing stability.

Chemical Bonding

The correct decreasing order of stability of I, II and III carbocations is?

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