MCQ
How many representations of lactic acid are possible in Fischer projection $(d $ & $l)$ ?
- A$8$
- B$12$
- ✓$24$
- D$36$
✓
Answer
Correct option: C.
$24$
c
$(c)$
$(c)$
There are $24 ( = 4!$ this being the number of permutations of $4$ ligands among $4$ sites) ways of writing the projection formula ; $12 $ correspond to one enantiomer and $12 $ to the other. , Twelve of these, corresponding to the $(+)$ enanti_omer, are depicted in Fig. ; the $12$ mirror images of those shown would represent the $(-)$ isomer.
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