Optical isomerism

Can someone please help me answer this question
Which pair of compounds does not form a racemic mixture when the compounds react?
But-2-ene with HCl
But-1-ene with HCl
propanone with HCN
butenal with HCN

Reply 1

rosepower

Original post by egmoffat

won't it just be the one that has a chiral carbon?

Reply 2

egmoffat

Original post by rosepower

won't it just be the one that has a chiral carbon?

Yes but how do you know which has a choral carbon? I don’t understand this at all

Reply 3

charco

Study Forum Helper

Original post by egmoffat

Yes but how do you know which has a choral carbon? I don’t understand this at all

If you listen carefully the choral carbon is the one humming in tune ...

Reply 4

egmoffat

No I’m sorry I didn’t mean choral my predictive text changed it from chiral

Reply 5

CheeseIsVeg

Original post by egmoffat

No I’m sorry I didn’t mean choral my predictive text changed it from chiral

Have you drawn out all the structures of the reagents described in your OP?
Have a look at each carbon.
Do you know the definition for chirality?

Original post by charco

If you listen carefully the choral carbon is the one humming in tune ...

(edited 5 years ago)

Reply 6

rosepower

Original post by egmoffat

Yes but how do you know which has a choral carbon? I don’t understand this at all

A chiral carbon is one that has 4 different atoms or groups attached to it

Reply 7

egmoffat

Original post by CheeseIsVeg

Have you drawn out all the structures of the reagents described in your OP?
Have a look at each carbon.
Do you know the definition for chirality?

:toofunny:

Okay thanks yeah I have drawn them out. I think I just don’t get a level chemistry full stop. Thank you for your help