Organic Chemistry I
A step-by-step course where each section builds on the previous. Pass a checkpoint to skip ahead.
All sections
Every section, review, and the final exam. Pass the checkpoint at the end of each section to unlock the next; reviews and the final are always available for skip-ahead.
- Section 1 · The FoundationContinue
Bonding & Structure
Build your foundation in organic chemistry by understanding how atoms bond to form molecules. Master hybridization, geometry, and polarity.
4 lessons · ~2.5h - Section 2 · The Language of Organic ChemistryLocked
IUPAC Nomenclature
Learn to name organic molecules using IUPAC conventions, from straight-chain alkanes to branched and cyclic hydrocarbons.
3 lessons · ~2h - Section 3 · The Language of ReactivityLocked
Functional Groups
Learn to recognize the key functional groups in organic chemistry and understand how they determine a molecule's properties and reactivity.
3 lessons · ~2h - Section 4 · Electron MovementLocked
Resonance & Delocalization
Learn to draw resonance structures and predict how electron delocalization affects stability and reactivity.
3 lessons · ~2h - Review 1 · Sections 1–4Checkpoint
Cumulative Review 1
Test your knowledge across bonding, nomenclature, functional groups, and resonance. See which topics you've mastered and which need more practice.
Skip-ahead checkpoint · ~0.5h - Section 6 · Proton Transfer & ReactivityLocked
Acids & Bases
Master acid-base theory: Brønsted-Lowry and Lewis definitions, the pKa scale, factors controlling acidity, and predicting reaction direction.
3 lessons · ~2h - Section 7 · Shape, Strain & StabilityLocked
Conformations
Explore how molecules rotate around single bonds, read Newman projections, and master cyclohexane chair conformations.
3 lessons · ~2h - Section 8 · Mirror Images & 3D ArrangementLocked
Stereochemistry
Discover chirality, assign R/S configurations using CIP priority rules, and classify stereoisomeric relationships.
3 lessons · ~2.5h - Section 9 · How & Why Reactions HappenLocked
Introduction to Reactivity
Learn to identify nucleophiles and electrophiles, read curved arrow mechanisms, and use energy diagrams to predict whether reactions are favorable.
3 lessons · ~2.5h - Review 2 · Sections 1–8Checkpoint
Cumulative Review 2
A comprehensive review of everything from bonding through reactivity. Covers acids and bases, conformations, stereochemistry, and reaction fundamentals.
Skip-ahead checkpoint · ~0.75h - Section 11 · SN1 & SN2 ReactionsLocked
Nucleophilic Substitution
Master the two nucleophilic substitution mechanisms, learn when each one operates, and predict products with correct stereochemistry.
3 lessons · ~2.5h - Section 12 · E1 & E2 MechanismsLocked
Elimination Reactions
Learn how bases remove protons to form alkenes through E2 and E1 mechanisms, predict major products using Zaitsev's rule, and determine when elimination competes with substitution.
3 lessons · ~2.5h - Section 13 · Electrophilic AdditionLocked
Alkene Reactions
Learn the major addition reactions of alkenes: hydrohalogenation, halogenation, hydration, and hydroboration. Predict regiochemistry (Markovnikov vs. anti-Markovnikov) and stereochemistry (syn vs. anti addition).
3 lessons · ~2.5h - Section 14 · Triple Bond ChemistryLocked
Alkyne Reactions
Learn how alkynes react through electrophilic addition, reduction, and deprotonation. Understand the unique acidity of terminal alkynes and how to use acetylide anions in synthesis.
3 lessons · ~2.5h - Section 15 · Oxygen-Containing Functional GroupsLocked
Alcohols & Ethers
Explore how the hydroxyl group influences structure, acidity, and reactivity. Learn key transformations of alcohols (dehydration, oxidation, substitution) and ether synthesis and cleavage, including epoxide ring opening.
3 lessons · ~2.5h - Section 16 · Benzene and BeyondLocked
Aromaticity & EAS
Understand what makes a molecule aromatic using Huckel's rule, then master electrophilic aromatic substitution (EAS) and how substituents direct incoming electrophiles.
3 lessons · ~2.5h - Final exam · Comprehensive FinalFinal Exam
Orgo 1 Final Exam
A comprehensive 45-minute final exam covering all of Organic Chemistry I, from bonding and structure through reaction mechanisms. See which topics you have mastered and where you need more practice.
Final checkpoint · ~0.75h
About this course
OrgoSolver’s Organic Chemistry I course is a free, progressively unlocked path through the material a typical first semester of organic chemistry covers. Lessons are short, built around a single concept at a time, and mix explanation with practice questions so you get feedback as you go.
Who it’s for
Undergraduates taking Orgo I, students preparing for the MCAT or DAT, and anyone self-studying organic chemistry fundamentals. No prior coursework is assumed beyond general chemistry.
What you’ll learn
- Atomic structure, covalent bonding, hybridization, and molecular geometry.
- Reading and writing IUPAC names, identifying functional groups, and drawing resonance structures with curved-arrow notation.
- Acid–base behavior, conformational analysis, and the 3D thinking behind stereochemistry.
- Reaction fundamentals: nucleophiles, electrophiles, substitution (SN1/SN2), elimination (E1/E2), and addition across π bonds.
- Alkynes, alcohols & ethers, and the aromaticity rules that set up electrophilic aromatic substitution.
How checkpoints work
Each section ends with a checkpoint quiz. Pass it to unlock the next section. Cumulative reviews sit between groups of sections and are always available — if you already know the material, passing the review lets you skip ahead without replaying individual lessons.