Racemic Mixture, Enantiomeric Excess and Walden Inversion | Isomerism Part 11 | JEE · NEET

A reaction flips the sign of rotation. Did the configuration change? Not necessarily. 📘 In this part (11 of 14) 1️⃣ Racemic mixtures and racemisation 2️⃣ Retention, inversion and enantiomeric excess 3️⃣ Resolution, asymmetric synthesis and Walden inversion 🧭 Topics in this video • Racemic mixture and racemisation • Retention, inversion and racemisation in reactions • Enantiomeric excess and optical purity • Resolution of racemic mixtures • Asymmetric synthesis • Walden inversion ✏️ Your turn: [α]obs = +6.75°, pure (+)-2-butanol = +13.5°. % of (+) form? Answer in the comments! 📄 Companion page, formula sheet and practice set: https://layrd.live 📚 Isomerism: all 14 parts (playlist: Isomerism | JEE · NEET | layrd.live) • Part 1: Isomers: Chain, Position and Ring-Chain    • Isomerism Basics: Chain, Position and Ring...   • Part 2: Functional Isomerism    • Functional Isomerism: Every Family You Nee...   • Part 3: Metamerism    • Metamerism: Ethers, Ketones, Amines, Amide...   • Part 4: Tautomerism and Keto-Enol Equilibrium    • Keto-Enol Tautomerism: Enol Content, Mecha...   • Part 5: Other Types of Tautomerism    • Other Tautomerism: Nitro, Oxime, Enamine, ...   • Part 6: Degree of Unsaturation and Counting Isomers    • Degree of Unsaturation and Counting Isomer...   • Part 7: Geometrical (cis-trans) Isomerism    • Geometrical Isomerism: Cis-Trans, Syn-Anti...   • Part 8: Optical Activity, Symmetry and Chirality    • Optical Activity, Chirality and Chiral Cen...   • Part 9: Optical Isomerism Without a Chiral Carbon    • Chiral Without a Chiral Carbon: Allenes, S...   • Part 10: Lactic Acid, Tartaric Acid and Counting Stereoisomers    • Lactic Acid, Tartaric Acid and Counting Op...   ▶ Part 11: Racemic Mixtures, Optical Purity and Configuration (this video) • Part 12: Diastereomers, Fischer Projections and D/L Configuration    • Fischer Projections, Diastereomers and D/L...   • Part 13: Conformations of Ethane, Propane and Butane    • Conformations of Ethane and Butane: Newman...   • Part 14: Conformations of Cyclohexane    • Cyclohexane Chair, Boat, Axial and Equator...   ⏱ Chapters 0:00 Mixtures and reactions 0:16 Racemic mixtures and racemisation 0:53 Retention, inversion, racemisation 1:40 Enantiomeric excess and optical purity 2:49 Resolving a racemic mixture 3:46 Asymmetric synthesis 4:16 Walden inversion 4:51 JEE question + traps 5:33 Recap 🔔 Subscribe to layrd.live: Layer by Layer. Follow layrd.live 🌐 layrd.live https://layrd.live ▶️ youtube/layrd_live    / @layrd_live   📸 instagram/layrd_live   / layrd_live   #Chemistry #JEE #NEET #OrganicChemistry #layrdlive #STEM