Identify the correct acidic strength order in the following compounds?

a)
I > III > II

b)
II > III > I

c)
I > II > III

d)
III > I > II

Correct answer is option 'A'. Can you explain this answer?

Question

Identify the correct acidic strength order in the following compounds?a)I > III > IIb)II > III > Ic)I > II > IIId)III > I > IICorrect answer is option 'A'. Can you explain this answer?

Answer

In option (a) COOH group will go out of plane ...due to ortho effect.......so it is acidic  .....but why option(2)more acid than option 3......??????

Answer

The answer is incorrect correct answer is, C

Answer

Same question why second is more than third

Answer

In I. the ortho effect is highly effective and hence is most acidic among II AND III . In option II. the tertiary butoxy group increases the electrohillic nature of benezene ring and hence the negative charge formed on phenoxide ion after the removal of proton gets more dispersed in the ring and thus the anion gets stable and becomes more acidic then III.( benzoic acid).
Thus Correct option is A

Answer

Due to ortho effect benzoic acid k ortho pr agr grp jida ho to uski acidity sbse jyada hoti h

Answer

The ll compound doesn't have the Ortho Effect.
So, the conjugate base will be resonance stabilized.
lll compound due the -M effect of the _COOH group
the O-H bond polarity will be decreased .Hence, acidity order is ll>lll .

Answer

Ans A is the right answer due to ortho effect  i.e. more groups present in ortho position , more will be the acidity

Answer

Why second is more acidic then third

Answer

Correct answer is option (c)

Answer

A is more acidic due to ortho effect  In B and C  c is more than B because after proton loss conjugation stabilises it and last one t butyl group + I effect donate electron density to  ring leads to destabilization of phenoxide ion..so option A is correct.

Answer

Why second is more acidic then third

Answer

Due to ortho effect, II will be more acidic than III, due to intramolecular bond between the oxygen and hydrogen that makes stable compund,

Answer

A

Answer

Inductive effect is decreasing so that's why A is correct

Answer

inductive effect of decreasing order

Answer

Why second is more than 3

Answer

Explain

Answer

Option c ,ortho substituted benzoic acid is greater than benzoic acid in acid strength

Answer

C bcz o substituted benzoic is more acidic than normal benzoic acid & phenol is less acidic than benzoic acid

Answer

Correction- in place of OH there will COOH Group . the a pat will correct.

Answer

I am also thinking the same why second one is more acidic than third one

Answer

Ortho effect is the reason for 1st than stability seen in other cases.
n bcz pka value of 3rd is greater than 2nd hence, 2nd is more acidic than 3rd

Answer

Because of steric repulsion of two bulky t-Bu group in Option A

Answer

Correct answer is option c

Answer

Why second is more acidic then third usually carboxylic acid shows ortho effect not phenol then?

Answer

It is easily explain by the stability of conjugate base by inductive

Answer

1st more acidic due to SIR effect (extremely Ortho) ...in case 2nd tertiary butyl has only inductive effect and OH is smaller but ortho effect not considered so benzenoic acid (3rd) more acidic than phenol substituted (2nd) .
option 2< /><1>

Answer

I is more acidic because it has 2 but gp which shows +I effect so that will more acidic and II have only 1 so that it is less acidic then I and III have no one gp which shows +I affec so it is more less acidic in nature

Answer

Pka of compound (2) is 10. 28 and that of compound (3) is 4.2 . so 3 is clearly more acidic than 2. Write answer will be (C).

Similar Chemistry Doubts

Identify correct acidic strength order in the following compounds