decarboxylation

compare d rate of decarboxylation
RC(CI)COOH N RC(F)COOH

24 Answers

1
vector ·

but d ans is ist

19
Debotosh.. ·

decarboxylation can occur in the following class of compounds:

(1)β-keto esters

(2)1,1 dicarboxylic acids( generally called "LAMNAC" rule)

(3)β,γ unsaturated acids

additional note: decarbonylation (-CO) occurs in the case of α-keto esters or α-keto acids.

1
vector ·

u got d q or not

1
skygirl ·

where are they ?

okay .. i will try them for sure :)

1
vector ·

even i support u plz try out my other doubts

24
eureka123 ·

there is no resonace,,,, only inductive effect and we all know -I effect of F is max .......so 2nd carbanion max stable.........so 2nd more reactive

24
eureka123 ·

ans is 2

1
skygirl ·

i dunno ... but i am quite sure abt my explanation ...

1
vector ·

bansal sheet question

24
eureka123 ·

yup ans is rong.......

1
skygirl ·

this is from which book ... ??

i dunno... ans may be wrong ...

1
skygirl ·

more the -I effect... more stabilised the carbanion will be ...

11
Anirudh Narayanan ·

Which type of decarboxylation: Soda lime or the other one (involving electrolysis....i don't remember it's name)?

Cos the latter occurs via free radicle formation.....whose stability can differ with the halogen group attached.

1
skygirl ·

24
eureka123 ·

dont say this mathie..................[2]
yesterday only u were solving chem problems in such a gr8888 way......[5]

1
vector ·

but -i effect of f is more than cl how would u justify that

1
skygirl ·

rate in second will be more...

since electronegativity of F is more than Cl.

so the carbanion formed is more stabilised in second one...

39
Dr.House ·

anywys i am not gud at chemistry...... leave it...............

24
eureka123 ·

how charge will be more dispersed if F is more Electronegative????

charge will get concentrated about F....[1]

39
Dr.House ·

now come on, how come do u say charge is dispersed? R ke place main kuch bhi ho sakhta hain na

1
vector ·

ur ans is right but not explaination if f is more electronegative than charge is more dispersed n thus more stable

39
Dr.House ·

if thats the case eureka, then obviously first one will b e more stable as chlorine is less elctronegative than flourine.

24
eureka123 ·

check the carbanion stablity....[1]

1
vector ·

soda lime

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