Master Organic Chemistry 1
Structure and bonding, stereochemistry, substitution and elimination, alkene/alkyne/radical reactions, alcohols, and 1D spectroscopy. Includes a 1–5 AP-equivalent score predictor.
Start here
Take the free Organic Chemistry diagnostic
It finds what you already know and builds your study plan: the topics to clear first, each a short lesson plus an exit quiz.
Take the free diagnosticInteractive Lessons
Step-by-step coverage of all 13 OChem 1 topics with mechanism walkthroughs and worked examples.
Diagnostic Test
Benchmark your performance across the OChem 1 curriculum and surface the topics to prioritize.
AP-Equivalent Score Predictor
Convert your quiz performance and topic mastery into an AP-equivalent 1–5 score, the way AP Chemistry students are scored.
Flashcards
Reagents, named reactions, and key spectroscopy data for OChem 1.
Daily question
A fresh organic question every day — keep mechanisms sharp.
Exit Quizzes
Per-lesson assessments confirm mastery before you advance.
Organic Chemistry 1 Curriculum
5 units · 13 topics · ~90 interactive lesson parts
Unit 1 · Structure, Bonding & Acid-Base
- Atomic structure & hybridization
- Lewis structures & resonance
- Molecular representations & IMFs
- Organic acids and bases (pKa, factors affecting acidity)
Unit 2 · Alkanes & Stereochemistry
- Alkane / cycloalkane nomenclature
- Newman projections & cyclohexane chairs
- Chirality, R/S, optical activity
- Enantiomers, diastereomers, meso
Unit 3 · Substitution & Elimination
- SN2 vs SN1 (substrate, Nu, LG, solvent)
- E2 vs E1 (Zaitsev, Hofmann, anti-periplanar)
- SN/E decision framework
Unit 4 · Alkenes, Alkynes & Radicals
- Electrophilic addition; Markovnikov / anti-Markovnikov
- Hydroboration-oxidation, ozonolysis, epoxidation
- Acetylide chemistry; Lindlar / Na-NH₃
- Radical halogenation & NBS
Unit 5 · Alcohols, Ethers & Spectroscopy
- Grignards, dehydration, oxidation
- Williamson ether synthesis & epoxide opening
- IR & mass spectrometry
- ¹H and ¹³C NMR fundamentals
About the AP-Equivalent Score (1–5)
Organic Chemistry isn't an official AP subject, but Organic Chemistry 1 is taught at AP-equivalent depth. The score predictor blends 70% quiz performance and 30% topic mastery rate and maps the result onto the same 1–5 scale used for AP Chemistry — so you can intuit your standing the way you would for any other AP science.
- • 5 — Top performance (≥ 85%): on track for honors-level mastery.
- • 4 — Strong (≥ 70%): solid grasp; refine weak topics.
- • 3 — Passing (≥ 55%): foundational understanding; rebuild a few units.
- • 2 — Below passing (≥ 35%): focused remediation needed.
- • 1 — Beginning (< 35%): work through the lessons end-to-end.