Does Resonance Occur in Nitrobenzene Despite Having One Pi Bond?

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SUMMARY

Resonance occurs in nitrobenzene (C6H5NO2) despite the presence of only one pi bond. The discussion highlights that the pi electrons in the nitro group (NO2) are attracted to the benzene ring, facilitating resonance due to the positive charge associated with the nitro group. This interaction contributes to the overall bond strength within the molecule. The presence of conjugated pi bonds is essential for resonance to manifest in nitrobenzene.

PREREQUISITES
  • Understanding of resonance in organic chemistry
  • Familiarity with the structure of benzene (C6H6) and nitrobenzene (C6H5NO2)
  • Basic knowledge of pi bonds and their role in conjugation
  • Concept of charge distribution in molecular structures
NEXT STEPS
  • Study the principles of resonance in organic compounds
  • Learn about the effects of substituents on benzene reactivity
  • Explore the concept of conjugation and its impact on molecular stability
  • Investigate the role of electron-withdrawing groups in resonance structures
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Chemistry students, organic chemists, and anyone interested in understanding molecular interactions and resonance in aromatic compounds.

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"My teacher had mentioned that resonance would occur here due to the presence of a positive charge if benzene is attached. However, if we consider two bonds without breaking them, there will be one pi bond. So, will there be no resonance due to it?"
 

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Though I am a layman on quantum chemistry, benzene (C6H6) is negatively charged inside the ring, and positively charged on the outside. The Pi electrons in NO2 tends to be attracted to benzen and have some tendency to break. The resonance would be incorborated into total bond strength.
 
this_is_harsh said:
"My teacher had mentioned that resonance would occur here due to the presence of a positive charge if benzene is attached. However, if we consider two bonds without breaking them, there will be one pi bond. So, will there be no resonance due to it?"
Your question is not clear. Could you rephrase it?

Resonance is ubiquitous in conjugated pi bonds.
 

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