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I need a list of +r and -r group members

I need a list of +r and -r group members

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2 Answers

Sakshi
askIITians Faculty 652 Points
7 years ago
R effect corresponds to mesomeric effect. It is the phenomenon by which an aromatic ring gets activated at different corners of the ring.(Benzene).
Groups like OH, OR and NH2, NHR, NR2 etc. are found to show +R effects

-R effect is the phenomenon when a functional group participating in resonance induces relatively greater positive charge in the first and the third atom of the ring. Groups like COOH, CHO, NO2, CN and NO etc show -R effect
Kushagra Madhukar
askIITians Faculty 628 Points
2 years ago
Dear student,
Please find the answer to your question below.
 
R effect corresponds to mesomeric effect. It is the phenomenon by which an aromatic ring gets activated at different corners of the ring.(Benzene).
Groups like OH, OR and NH2, NHR, NR2 etc. are found to show +R effects
 
-R effect is the phenomenon when a functional group participating in resonance induces relatively greater positive charge in the first and the third atom of the ring.
Groups like COOH, CHO, NO2, CN and NO etc show –R effect
 
Thanks and regards,
Kushagra

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