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Organic Chemistry

Blazing goIITian

Joined:	19 Mar 2007
Post:	585

23 Oct 2007 13:15:32 IST

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771

idoform test

None

who will not give ??????

a pyruvic acid

b lactic acid

c acetophenone

d propionic acid

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Comments (3)

Ankur Verma

Blazing goIITian

Joined: 29 Mar 2007

Posts: 555

23 Oct 2007 14:06:42 IST

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a) CH₃COCO₂H

b)CH₃CH(OH)COOh

c) C₆H₅COCH₃

d )CH₃CH₂COOH

c d structures r given above out of which 1st 3will give n d last one won't coz d rule to identify tht which will give haloform test or not is

d compound having structure R-C=O CH3 or RCH-OH CH3 will give rest of d compounds will not give d haloform test

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Gaurav |spideyunlimited| Ragtah

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Joined: 16 Dec 2006

Posts: 3373

23 Oct 2007 17:01:39 IST

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d) Propionic acid will not give iodoform test as CH3-(C=0)-C
or CH3-(C=0)-H linkage is not present in the compound.

arun-rashi

Forum Expert

Joined: 19 Oct 2006

Posts: 1057

23 Oct 2007 19:02:39 IST

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ONLY d will not give haloform test because acid does not have pure -COCH3 group due to resonance .in case of pyruvic acid CH3COCOOH there is seprate COCH3 GROUP SO it give haloform test.lactic acid on oxidation give pyruvic acid so it also give.while formula of acetophenone C6H5COCH3 have COCH3 so it give haloform test.

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