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Question
Resonance effect is NOT observed in ______.
Options
\[\ce{CH2 = CH - Cl}\]
\[\ce{CH2 = CH - CH2 - NH2}\]
\[\ce{CH2 = CH - CH = CH2}\]
\[\ce{CH2 = CH - C = N}\]
MCQ
Fill in the Blanks
Solution
The resonance effect is NOT observed in \[\ce{CH2 = CH - CH2 - NH2}\]
Explanation:
In a conjugated system of π electrons, resonance is seen. The lone pair on the "N" atom in option (B) is not conjugated to the carbon-carbon π bond. As a result, the structure specified in the option does not exhibit a resonance effect (B).
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Fundamental Concepts in Organic Reaction Mechanism - Electron Displacement Effects in Covalent Bonds
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