Free guides · Organic Chemistry I
Understand the mechanism. Then draw the arrows.
Practice curved arrows, substitution and elimination, IUPAC naming, chair conformations, R/S configuration, and resonance. Work through examples, then check your answers.
How to draw curved arrows
Find the electron source, choose the destination, and check bonds, octets, and formal charges.
02 · SubstitutionSN1 vs SN2
Compare one-step and carbocation pathways, then work through worked examples and 8 practice problems with solutions.
03 · EliminationE1 vs E2
See why base strength and anti-periplanar geometry matter, and when Zaitsev or Hofmann products are favored.
04 · Put it togetherSubstitution vs elimination
Use the substrate, reagent, solvent, and temperature to choose among SN1, SN2, E1, and E2.
05 · PracticeArrow pushing practice problems
Curved-arrow rules, the five patterns behind most mechanisms, the classic mistakes, and 8 practice questions.
06 · NamingIUPAC nomenclature practice
Name alkanes, alkyl halides, alkenes, alcohols, ketones, and acids step by step, then test yourself with 8 questions.
07 · PracticeSN1, SN2, E1, E2 practice problems
A mixed problem set: decide the mechanism, then predict the major product, with 3 worked examples and 8 questions.
08 · ConformationsChair conformation practice
Axial vs equatorial, ring flips, cis/trans on chairs, and which chair wins, with a chair pattern tool and 8 questions.
09 · StereochemistryR and S configuration practice
Rank groups with the CIP rules, then assign R or S from wedges, dashes, and Fischer projections.
10 · ReferenceSN1/SN2/E1/E2 cheat sheet
A printable chart, decision flow chart, and reagent and solvent tables for substitution and elimination.
11 · PracticeResonance structures practice
Push arrows, assign formal charges, and pick the major resonance contributor, with 8 practice problems.
Common questions
Where should I start?
Start with curved arrows if electron pushing is new. Then read the substitution and elimination comparisons before using the combined decision guide.
Do I need an account to read these guides?
No. Every guide is free to read, with diagrams and explanations available directly on the page.