56 reactions · 7 families · en-US
Organic chemistry reactions list: 56 reactions in seven families
Browse 56 core undergraduate organic chemistry reactions in seven families — substitution, elimination, addition, redox, carbonyl, aromatic, and pericyclic. Free web index with links to mechanism study hubs; full library in the OrgoMech iOS app.
This index mirrors the OrgoMech app Library (§ substitution through pericyclic). Each row points to a free mechanism hub — open the app for full mechanisms, Predict, and the Daily Drill.
Families in the library
Substitution (9)
SN1 vs SN2 hub →Elimination (6)
E1 vs E2 hub →Addition (13)
Alkene addition hub →Redox (9)
Oxidation & reduction hub →Carbonyl chemistry (9)
Carbonyl chemistry hub →Aromatic (8)
Electrophilic aromatic substitution →Pericyclic (2)
Mechanism hubs →
Full catalog
Filter like the in-app Library — search by name, reagent keyword, or family chip.
Showing 56 of 56 reactions.
| Reaction | Family | Level | Free study hub |
|---|---|---|---|
| SN2 — Primary Alkyl Halide | Substitution | Intro | SN1 vs SN2 hub |
| SN1 — Tertiary Alkyl Halide | Substitution | Intro | SN1 vs SN2 hub |
| SN2 — Cyanide Displacement | Substitution | Intro | SN1 vs SN2 hub |
| SN2 — Thiolate Displacement | Substitution | Intro | SN1 vs SN2 hub |
| SN2 — Amination with NH₃ | Substitution | Intermediate | SN1 vs SN2 hub |
| SN1 — Benzyl Halide | Substitution | Intermediate | SN1 vs SN2 hub |
| SN2 — Allylic Halide | Substitution | Intermediate | SN1 vs SN2 hub |
| Finkelstein — Halide Exchange | Substitution | Intro | SN1 vs SN2 hub |
| Allylic Bromination — NBS | Substitution | Intermediate | SN1 vs SN2 hub |
| E2 — Anti-periplanar Elimination | Elimination | Intermediate | E1 vs E2 hub |
| E1 — Tertiary Elimination | Elimination | Intermediate | E1 vs E2 hub |
| E2 — Hofmann Product (Bulky Base) | Elimination | Intermediate | E1 vs E2 hub |
| E1 — Alcohol Dehydration | Elimination | Intro | E1 vs E2 hub |
| E2 — Cyclohexyl Bromide | Elimination | Advanced | E1 vs E2 hub |
| E1cB — Poor Leaving Group | Elimination | Advanced | E1 vs E2 hub |
| Markovnikov — HBr to Alkene | Addition | Intro | Alkene addition hub |
| Anti-Markovnikov — Radical HBr | Addition | Intermediate | Alkene addition hub |
| Anti Addition — Br₂ to Alkene | Addition | Intermediate | Alkene addition hub |
| Halohydrin Formation — Br₂ / H₂O | Addition | Intermediate | Alkene addition hub |
| Hydroboration–Oxidation | Addition | Intermediate | Alkene addition hub |
| Oxymercuration–Demercuration | Addition | Intermediate | Alkene addition hub |
| Epoxidation — mCPBA | Addition | Intermediate | Alkene addition hub |
| Syn Dihydroxylation — OsO₄ | Addition | Advanced | Alkene addition hub |
| Ozonolysis — Reductive Workup | Addition | Intermediate | Alkene addition hub |
| HBr Addition to Alkyne | Addition | Intermediate | Alkene addition hub |
| Alkyne Hydration — Hg²⁺ | Addition | Intermediate | Alkene addition hub |
| Hydroboration of Terminal Alkyne | Addition | Advanced | Alkene addition hub |
| HCl Addition to Alkene | Addition | Intro | Alkene addition hub |
| Catalytic Hydrogenation — Alkene | Redox | Intro | Oxidation & reduction hub |
| Lindlar Reduction — cis-Alkene | Redox | Intermediate | Oxidation & reduction hub |
| Dissolving Metal — trans-Alkene | Redox | Advanced | Oxidation & reduction hub |
| Primary Alcohol — Strong Oxidation | Redox | Intro | Oxidation & reduction hub |
| PCC — Alcohol to Aldehyde/Ketone | Redox | Intro | Oxidation & reduction hub |
| Secondary Alcohol → Ketone | Redox | Intro | Oxidation & reduction hub |
| LiAlH₄ — Carbonyl Reduction | Redox | Intro | Oxidation & reduction hub |
| NaBH₄ — Selective Carbonyl Reduction | Redox | Intro | Oxidation & reduction hub |
| Cold Dilute KMnO₄ — Syn Diol | Redox | Intermediate | Oxidation & reduction hub |
| Grignard + Aldehyde | Carbonyl chemistry | Intermediate | Grignard mechanism hub |
| Grignard + Ketone | Carbonyl chemistry | Intermediate | Grignard mechanism hub |
| Grignard + Ester (2 equiv) | Carbonyl chemistry | Advanced | Grignard mechanism hub |
| Cyanohydrin Formation | Carbonyl chemistry | Intermediate | Carbonyl chemistry hub |
| Acetal Protection | Carbonyl chemistry | Intermediate | Carbonyl chemistry hub |
| Aldol Addition | Carbonyl chemistry | Advanced | Carbonyl chemistry hub |
| Wittig Olefination | Carbonyl chemistry | Advanced | Carbonyl chemistry hub |
| Saponification — Ester Hydrolysis | Carbonyl chemistry | Intermediate | Carboxylic acid derivatives hub |
| Fischer Esterification | Carbonyl chemistry | Intermediate | Carboxylic acid derivatives hub |
| Friedel–Crafts Alkylation | Aromatic | Advanced | Aromatic substitution hub |
| Friedel–Crafts Acylation | Aromatic | Intermediate | Aromatic substitution hub |
| EAS — Nitration | Aromatic | Intro | Aromatic substitution hub |
| EAS — Chlorination | Aromatic | Intro | Aromatic substitution hub |
| EAS — Sulfonation | Aromatic | Intermediate | Aromatic substitution hub |
| Nitration of Toluene — o/p | Aromatic | Intermediate | Aromatic substitution hub |
| Phenol — Polybromination | Aromatic | Intermediate | Aromatic substitution hub |
| Aniline — Controlled Nitration | Aromatic | Advanced | Aromatic substitution hub |
| Diels–Alder Cycloaddition | Pericyclic | Advanced | Alkene & diene reactions hub |
| Electrocyclic 4π | Pericyclic | Advanced | Mechanism hubs (overview) |
Study the pattern in a hub. Drill it in the app.
OrgoMech Pro includes every mechanism step, product prediction, and spaced-repetition practice for all 56 reactions.
Reaction library FAQ
How this list relates to OrgoMech on iOS and free web hubs.
- How many reactions are in the OrgoMech library?
- Fifty-six core undergraduate reactions, grouped into seven families: Substitution (9), Elimination (6), Addition (13), Redox (9), Carbonyl Chemistry (9), Aromatic (8), and Pericyclic (2).
- Is this the same list as the OrgoMech app?
- Yes. This page mirrors the in-app Library catalog. Each row links to a free mechanism hub on OrgoMech.com; mechanisms, drill practice, and Predict run inside OrgoMech Pro on iOS.
- Where are orgo 1 vs orgo 2 reactions?
- Substitution, elimination, and alkene addition are typical orgo 1 cores. Carbonyl, aromatic, many redox entries, and pericyclic reactions align with orgo 2 — use the family chips to filter.
- Why does each reaction link to a hub instead of its own page?
- Hubs teach the mechanism patterns once (SN1/SN2, E1/E2, etc.) instead of duplicating 56 thin pages. Search engines and students get a clear reactions list plus deep guides.
- How do I practice these reactions?
- Read the linked hub, then use the OrgoMech Daily Drill for exam-style questions or Predict to draw your own reactant and reagents.
- What do Intro, Intermediate, and Advanced mean?
- Difficulty badges match the app library: Intro is early-course, Intermediate is standard exam fare, Advanced is upper orgo or tricky stereochemistry/regiochemistry.
- Who is this reactions list for?
- U.S. undergraduate organic chemistry students and pre-meds reviewing for finals or MCAT organic chemistry. Content is in English (en-US).
Continue on OrgoMech.com
Undergraduate orgo references (external)
Open textbooks and reference sites for the same topics covered above. We link out to established science education publishers — not affiliate pages.
- Organic Chemistry (OpenStax) — OpenStax
- Organic Chemistry LibreTexts — LibreTexts
- MIT OpenCourseWare — Organic Chemistry I — MIT OCW
- PubChem — NIH NLM