1
$\begingroup$

Which of the following group show +M and -I effect?

(A) $\ce{-\underset{\underset{\huge O}{||}}{C}-F}$
(B) $\ce{-\underset{\underset{\huge O}{||}}{C}-OR}$
(C) $\ce{-O^-}$
(D) $\ce{-OH}$

Answer is option D. D is obviously correct, but why not option C? $\ce{-O^-}$ has electrons to donate and is electronegative.

|improve this question
$\endgroup$
  • $\begingroup$ O- is an electron-rich species, which donates its charge to the ring, stringly activating it. It has a very strong +I effect! $\endgroup$ – The_Vinz Jul 9 '19 at 6:27

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.