Acidity order.. im confused when to use - i and when to use +r for halogen

read module bro.. dia hua hai halogen

but kahi pe bhi ho its simple think fluoro is a small group how does it will create inhibition in resonance with benzene ring

thats why module is there bro. and chemistry is full of expections 😊

please dont go wrong fluorine never create SIR effect yes but in halogen always -I effect is dominating over +M so after then order will 1>2>3>4

ortho effect in this case will not be its reason for acidity

when OCH3 group create partial sir how does fluorine create ortho effect then

go through module and qs bro.. i didn't make the concepts 😅

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but foreign author books cant be wrong these booklets may have error yes there is SIP when one gp is small and other is bulky but not SIR effect

for SIR both needs to be bulky

Ortho benzoic acid is most acidic this you know due to ortho effect

Now generally for halogens we see inductive effect and inductive effect decreases with increase in distance so 2>3

check this

No sourav this is wrong we check +M of fluorine in para position but not here...when we compare with para chloro or bromo benzoic acid then we use

Here only inductive effects works so 1>2>3>4

so it is wrong?

yes

let me check pka for confirming

ok sir

yes sourav para fluorobenzoic acid has pka 4.14

and benzoic acid has 4.20

sir when to check for +m in halogens?

at para position when compare with other halogens at para position

but generally check only inductive effect

sir here it is written as +R on O fluoro phenol

Khud se key notes bnao sourav😊

see reason...only take H bonding reason then -I

sir theory padhne k bad notes banau k qs karne k bad?

exceptions bahut milenge so notes krte jao padhne ke sath sath ek chota copy ya diary me