CHIRAL CENTRE

IN W HICH OF D FOLLOWING COMPOUNDS CHIRAL CENTRE IS NOT AFFECTED BY HEATING?
A CH3C(OH)COOH
BCH3C(OH)CH2COOH
C 2METHYL-BUTAN1,4-DIOIC ACID
D BETA KETO ACID

13 Answers

39
Dr.House ·

option c can be straight away ruled out. as on heating a dicarboxylic acid we get the according product.

39
Dr.House ·

i think answer should be d, as i see no possible efect o heating. { am i rite richa?}

39
Dr.House ·

a and b give alkenes, wont they? only b gives a alkene.

1
vector ·

aacc to me it must be none but a ns is acd i dont know why

39
Dr.House ·

baap re baap aaj mere saare answers galat. i know my brain as gone to hell. well srinath should see this thread

39
Dr.House ·

now i try to explain the answers as i know them............

that dioic acid wala, even though we get a product but that carbon with methyl wont be affected, so chiral centre would remain as it is.

1
skygirl ·

it will be C only...

39
Dr.House ·

i donno whats wrong, but aaj koi organic nahiin ban raha hain.

1
vector ·

in 1 oh is involved in h bonding thus no alkene no change

1
skygirl ·

1
Grandmaster ·

ans is d)

the logic is unknown (rather not needed as far as jee questions r concerned)

a list where decarboxylation takes place on heating

a)beta keto acids
b)geminal carboxylic acids

Thats it!![1]

1
vector ·

HEY SKY GIRL I VE GOT D ANS FOR 1 2 OH IS HYDROGEN BONDED WID COOH WID 5 N 6 MEMBER RING SO NO ALKENE

EVEN IF U WANNA DO DECARBOXYLATION A FIVE MEMBER RING
LL BE FORMED

1
skygirl ·

ohk!!

thanx!!

i was thinking that only ... ki main kuchh miss kar rahi hoon ... kuchh bond ya kuchh...

now its seeming a'r8 :)

tx.

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