# Is planarity really necessary for conjugation?

If we look at the $\ce{ClO4-}$ anion, the chlorine atom in it is sp3 hybridised. Hence, it has a tetrahedral structure in which conjugation shouldn't be possible, but while explaining the acidic strength of $\ce{HClO4}$, I've seen many people claim that it is very acidic because the $\ce{ClO4-}$ anion is stable due to the conjugation of charge between the four oxygen atoms.

So, all of this boils down to: Is planarity really necessary for conjugation?

## 1 Answer

this is a rather good question several students have actually asked me about it. it is not any exeption or contradiction .i have written the explanation below

• Could you type your answer out please? The content seems to be very nice. Thanks Apr 19 '18 at 8:06
• I can't read that, please type it out. I would then even consider removing my down-vote. Apr 25 '18 at 14:28