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Haloalkanes and Haloarenes — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryHaloalkanes and Haloarenes3 Marks
Question
Differentiate between retention and inversion.
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Answer

If the relative configuration of the atoms/ groups around a chiral centre in an optically active molecule remains the same before and after the reaction, the reaction is said to proceed with retention of configuration. On the other hand, if the relative configuration of the atoms/ groups around a stereocentre in the product is opposite to that in the reactant, the reaction is said to proceed with inversion of configuration.

For example,

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