A chiral carbon atom is bonded to four different groups. The structure of 2-chloro-3,4-dimethylhexane can be analyzed as follows:
- The second carbon (C-2) is chiral because it is attached to a chlorine atom, a methyl group, an ethyl group, and a hydrogen atom.
- The third carbon (C-3) is also chiral because it is bonded to a methyl group, a 2-chloropropyl group, a hydrogen atom, and another unique substituent.
Other carbons in the molecule do not satisfy the chiral carbon criteria. Hence, there are 2 chiral carbons.