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CH1012
CHIRALITY
                    optical isomers
(i) optical isomers classified as R / S depending on the direction of group ordering
(ii) arrange highest  ®  lowest priority
   view down C with lowest priority opposite
(iii) clockwise = R; anticlockwise = S
Chiral molecule = a molecule which exists in
2 forms, non-superimposable mirror images.
S                              R
1                                       1

2            3         3                  2