Isomerism Lecture 4 | E–Z System, CIP Rule & Optical Isomerism Introduction | JEE NEET | ChembyKKSir скачать в хорошем качестве

Isomerism Lecture 4 | E–Z System, CIP Rule & Optical Isomerism Introduction | JEE NEET | ChembyKKSir

Isomerism Lecture 4 | E–Z System, CIP Rule & Optical Isomerism Introduction | JEE NEET | ChembyKKSir ⸻ #Isomerism #Stereoisomerism #GeometricalIsomerism #EandZIsomerism #CIPRule #EECIPRule #CisTrans #OpticalIsomerism #Stereochemistry #OrganicChemistry #Class11OrganicChemistry #Class12OrganicChemistry #GOC #ReactionMechanism #JEE2026 #NEET2026 #JEEAdvanced #ChemistryByKKSir #ChembyKKSir ⸻ Namaste Dear Students 🙏 Welcome to Isomerism Lecture 4, a powerful continuation of Stereoisomerism where Geometrical Isomerism is completed with advanced naming rules, and Optical Isomerism is introduced. In Lecture 3, we studied Stereoisomerism, types of stereoisomerism (Conformational & Configurational), and detailed Geometrical Isomerism due to C=C, C=N, ring systems, π bonds in rings, and odd-membered cumulenes. In this lecture, we move one level higher and formalize the naming and physical understanding of GI. In this lecture, I — Krishna Kumar Sah (ChembyKKSir) — have discussed in full clarity: 🔹 E–Z System of Nomenclature • Limitation of cis–trans system • Need for E–Z naming • Step-by-step application method • Priority determination rules 🔹 CIP (Cahn–Ingold–Prelog) Rule / EECIP Rule • Atomic number priority concept • First point of difference rule • Isotope comparison • Multiple bond treatment • Practice-based explanation with examples 🔹 Geometrical Isomerism – Physical Properties • Difference in boiling point • Difference in melting point • Polarity comparison (cis vs trans) • Dipole moment logic • Stability comparison 🔹 Beginning of Optical Isomerism • What is optical isomerism • Plane polarized light concept • Chiral center introduction • Difference between geometrical & optical isomerism • Foundation for R–S configuration (to be continued) 🔥 Why This Lecture Is Extremely Important: • E–Z naming is frequently asked in JEE Advanced • CIP rule is compulsory for stereochemistry mastery • Physical property comparison questions are common • Optical isomerism is a major scoring topic This lecture connects with the entire Organic Chemistry syllabus: GOC, Reaction Mechanism, Hydrocarbons, Haloalkanes, Alcohols, Carbonyl Compounds, Carboxylic Acids, Amines, Biomolecules, Stereochemistry, and Advanced Mechanism Problems. If you master CIP rule and E–Z system clearly, stereochemistry questions will become systematic and predictable 🔥