chemistry·NCERT Class 12·Haloalkanes & Haloarenes (GOC chapter)
Isomerism & Chirality
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Thalidomide was sold as one drug, but it had two mirror-image forms — one cured nausea, the other caused birth defects. Chirality in 3D changes everything.
›Structural isomers: same formula, different connectivity.
›Enantiomers: non-superimposable mirror images; rotate plane-polarised light opposite ways.