GOC
This question confused me a little
for the last option Benzene will be a more stable carbocation than the carbocation of 5th , but benzene is more stable than 5th and protonation will be harder , when given situations like these what to do
24 Replies
@Dexter
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.You mean carbanion? You won't have carbocations or protonation here. It's carbanions and de-protonation
oh yes mb
carboanion
also i thought 1 would be best , but after thinking that 4 goes from anti to aromatic it makes sense , but why is 5 more than 1
Ok, so instead of using just ion logic, also think of reactions where you've seen this happen.
How do you test for presence of a terminal alkyne?
@Gamertug
Ag2O one?
i only know it happens idk what happnes
Or tetrammine copper(1) chloride yes
Basically, you get an acetylide salt
Which means that the proton is getting replaced by a metal atoms really quickly, really well
So, it's acting like an acid almost.
Which means that it's more acidic right?
But if you add benzene to ammoniacal copper chloride, you won't get a precipitate
So it's not as acidic
ah ic
but wouldnt extra stuff also effect the acidity capability
here we are talking abt when its isolated
Yeah, but experimental evidence is a better indicator than theoretical assumptions
so there isnt any way to do this question for sure?
only assumptions?
Well, that's the logic. Stability of conjugate base.
Except that ethyne is clearly more acidic than the benzene ones, and gaining aromaticity is the most preferential option
what how is it more acidic i still dont get that
evertyhing else i understood
Because it reacts with metal, when benzene doesn't.
that doesnt make any sense
?
it would mean it is more reactive to metal
what will that have to do with acidity
To be precise, metals displace hydrogen from it more readily
maybe its affinity for metals is higher
That is the definition of a Bronsted-Lowry acid.....
Ready proton donors
ye metal displaces the hydrogen , we are talking abt hydrogen leaving on its own
Not necessarily. Acidity also means ease of proton abstraction, not just ease of self-ionisation
ic
i understand it now
+solved @Opt
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