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Having doubt btw a and b
Arrange the following compound, in order of C-N bond length. NO2 Me Me Me e Me (B)O oO D) Me (A) -Me NO2 (a) D>C>B>A (6)D> D>C>A>B (c)A>B>C>D ()D>A>C>B
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Dinesh khalmaniya 1 Best Answer
option B
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how sir.
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is it correct??
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yes
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remember that more the resonance more is the double bond characters in single bond while more single bond characters in double bond.
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here C-N bond is single so here we will check double bond characters
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in option A non of methyl at ortho or para so no extended resonance possible while in B one methyl at para so it increase the resonance so double bond characters increase in C-N bond
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got it??
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Dinesh khalmaniya 1
hope this will help you 🙏🙏
why extended reso not possible
im not able to send msg
because+H effect works only at o and p position.
Hyperconjugation helps in extended reso?
yes it just like resonance
mean options B have more resonating structure compair to A, because here on methyl group at para position also included in resonance
got it?