3.3.7 OPTICAL ISOMERISM
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1
WHATS A CHIRAL(ASSYMETRIC) CARBON
Carbon attached to 4 different atoms/ groups of atoms
2
Non-superimposable?
Mirror images -When if two objects are on top of eachother, they dont form the same shape.
eg your hands
eg your hands
3
what is optical isomerism?
Molecules/compounds with same structural formula but have different spatial arrangement of atoms leading to 2 non-superimposable isomers due to chiral centre
4
whats a pair of optical isomers called?
Enantiomers
5
Give example of two enantiomers
6
Optically active?
Molecules which can rotate plane polarised light like chiral molecules
7
Relation of enantiomers with plane polarise light?
One will rotate it clockwise by set angle while other will rotate it anticlock wise by same set angle
8
example of how plane polarised lights gets rotated by optically active molecules
9
Racemic mixture (racemate)?
Mixture which contains equal amounts of both enantiomers making it look optically inactive
10
Nucleophillic addition?
Carbonyl group(C=O) has planar arrangement(120 degrees due to double bond) so Nucleophile can attack from ABOVE or below
Occurs between aldehydes/ketones and nucleophile(CN,H+)
Occurs between aldehydes/ketones and nucleophile(CN,H+)