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All lessons

Learn organic chemistry, one concept at a time.

Organic chemistry, chapter by chapter, in teaching order. Every lesson has four quadrants: watch, read, explore and test. New lessons are added regularly; the shorts for most of them are already on YouTube.

4 lessons live10 chapters · 42 concepts plannedFree · English

Start here: live lessons

StereochemistryIsomerismAbout 30 minutes · 4 quadrants StereochemistryChiralityAbout 35 minutes · 4 quadrants StereochemistrySpot the chiral carbonAbout 30 minutes · 4 quadrants Nucleophilic substitutionThe SN2 reactionAbout 30 minutes · 4 quadrants
01

Organic chemistry basics

How organic compounds are sorted and named.

  • Classification of organic compounds soon
  • Functional groups soon
  • IUPAC naming in four steps soon
  • Functional group priority soon
02

Electronic effects

How electrons are pushed and pulled inside molecules.

  • Electron-rich and electron-poor sites soon
  • Inductive effect soon
  • Resonance soon
  • Mesomeric (+R and −R) effect soon
  • Hyperconjugation soon
03

Structural effects and hydrogen bonding

Shape and H-bonds decide physical properties.

  • Steric effect soon
  • Steric inhibition of resonance soon
  • Hydrogen bonding soon
  • Intra- vs intermolecular H-bonding soon
  • Keto–enol tautomerism soon
04

Acids and bases in organic chemistry

Why some acids are stronger and some bases weaker.

  • Acid strength and the −I effect soon
  • Formic vs acetic acid soon
  • Phenol vs ethanol soon
  • Aniline vs methylamine soon
  • HSAB principle soon
05

Reaction mechanisms

The language of arrows, bonds breaking and reagents.

  • Curved arrow notation soon
  • Full arrow vs fishhook soon
  • Homolytic vs heterolytic fission soon
  • Electrophiles and nucleophiles soon
  • Types of organic reactions soon
06

Reactive intermediates

The short-lived species that every mechanism passes through.

  • Carbocations soon
  • Carbanions soon
  • Free radicals soon
  • Carbenes, nitrenes and benzyne soon
  • Stability orders compared soon
07

Aromaticity

Hückel's rule and why benzene is special.

  • Benzenoid and non-benzenoid aromatics soon
  • Aromatic ions soon
  • Aromatic, antiaromatic or non-aromatic? soon
09

Nucleophilic substitution

How one group replaces another on carbon.

10

Elimination

How alkenes are made from haloalkanes and alcohols.

  • E1 vs E2 soon
  • Saytzeff and Hofmann products soon

Watch every concept as a 34-second short on YouTube.