The following structures are : [figure]
- enantiomers.
- identical molecules.
- diastereomers.
- meso compounds.
Answer
(2) identical molecules.
Solution
Groups on the central carbon: Br, Cl, CH3 and Me — "Me" is the symbol for a methyl group, so two identical CH3 groups are attached.
⇒ only three different groups ⇒ the carbon is not a chiral centre; the compound is (CH3)2CBrCl (2-bromo-2-chloropropane), which is achiral.
An achiral molecule is superimposable on its mirror image ⇒ the two drawings (mirror images of each other) represent the same molecule.
∴ identical molecules
Answer: (2)