aldehydes and ketones Flashcards
(5 cards)
1
Q
hazard with KCN/HCN
A
toxic
2
Q
define chiral centre
A
-asymmetric C atom with 4 different groups bonded to it
-no plane of symmetry
3
Q
what property is different between two enantiomers
A
they rotate the plane of polarised light in opposite directions
4
Q
define racemic mixture and effect of mixture on plane polarised light
A
-equal amounts of both enantiomers are present
-optically inactive; no rotation of plane of polarised light
5
Q
explain why a racemic mixture is formed
A
-C=O group is planar
-equal chance of attack by nucleophile from either side
-racemic mixture is formed; optically inactive
