What is the difference between enantiotopics and homotopics ?
Answer:
These terms depend upon the steroactivity of the carbon atom. For the carbon to be active optically, the groups attached to it should all be different.
These relations are defined among the substituents attached to a carbon. When the substituents are the same, we call them homotopics. These make the compound optically inactive(achiral). Thus exchanging their positions will lead to no new compound formation. (e.g. - 2 hydrogen atoms on any carbon)
On the other hand, the substiuents are called enantiotopic if they generate the enantiomer of the compound when they exchange their positions. The compound is thus optically active. (chiral)
(e.g - the H and Cl atom in 2-chlorobutane, the Cl and Br atom in 2-chloro-2-bromo pentane, etc)
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