Organic Chemistry I
A step-by-step course where each section builds on the previous. Pass a checkpoint to skip ahead.
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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.
After Organic Chemistry I
Ready for the second semester? Continue with the Organic Chemistry II crash course, which picks up with conjugated systems and aromatic reactions and carries on through carbonyl chemistry to multistep synthesis.