NEET levelSingle correct optionDifficulty 1 of 3o3119
In neighbouring group participation, the nucleophile attacks the carbon twice in succession, each time from the side opposite to the group being displaced. The net stereochemical result at that carbon is
Acomplete racemisation
Bformation of a meso compound in every case
Cretention of configuration
Dinversion of configuration
Answer: C
Each backside attack inverts the carbon. Two successive inversions restore the original spatial arrangement, so the overall result is retention of configuration.