--- title: "Organic Reaction Mechanism Templates: SN1, SN2, E1, E2 | MolDraw" url: https://www.moldraw.com/templates/mechanisms/ description: "21 mechanisms templates: Core organic reaction mechanisms with curly arrows: SN1 and SN2 substitution, E1 and E2 elimination, aldol addition, imine and…" lang: en publisher: Scidart Academy generated: 2026-10-28 --- [MolDraw](https://www.moldraw.com/) › [Templates](https://www.moldraw.com/templates/) › Mechanisms # Mechanisms templates 21 templates · 3 free to download · for high school, A-level, AP and first-year university organic chemistry Core organic reaction mechanisms with curly arrows: SN1 and SN2 substitution, E1 and E2 elimination, aldol addition, imine and hemiacetal formation, ester hydrolysis, alkene bromination, radical chlorination and carbocation rearrangements. Each template shows every electron-pushing step clearly enough to teach from. [![Aldol addition template preview](https://www.moldraw.com/templates/aldol-addition.webp)**Aldol addition**Free](https://www.moldraw.com/templates/aldol-addition/)[![SN2 substitution template preview](https://www.moldraw.com/templates/sn2-substitution.webp)**SN2 substitution**Free](https://www.moldraw.com/templates/sn2-substitution/)[![SN1 substitution template preview](https://www.moldraw.com/templates/sn1-substitution.webp)**SN1 substitution**Free](https://www.moldraw.com/templates/sn1-substitution/)[![E2 elimination template preview](https://www.moldraw.com/templates/e2-elimination.webp)**E2 elimination**Premium](https://www.moldraw.com/templates/e2-elimination/)[![E1 elimination template preview](https://www.moldraw.com/templates/e1-elimination.webp)**E1 elimination**Premium](https://www.moldraw.com/templates/e1-elimination/)[![Acid-catalysed hemiacetal formation template preview](https://www.moldraw.com/templates/hemiacetal-formation.webp)**Acid-catalysed hemiacetal formation**Premium](https://www.moldraw.com/templates/hemiacetal-formation/)[![Imine formation template preview](https://www.moldraw.com/templates/imine-formation.webp)**Imine formation**Premium](https://www.moldraw.com/templates/imine-formation/)[![Ester hydrolysis (saponification) template preview](https://www.moldraw.com/templates/ester-saponification.webp)**Ester hydrolysis (saponification)**Premium](https://www.moldraw.com/templates/ester-saponification/)[![Bromination of an alkene template preview](https://www.moldraw.com/templates/alkene-bromination.webp)**Bromination of an alkene**Premium](https://www.moldraw.com/templates/alkene-bromination/)[![Radical chlorination of methane template preview](https://www.moldraw.com/templates/radical-chlorination.webp)**Radical chlorination of methane**Premium](https://www.moldraw.com/templates/radical-chlorination/)[![Resonance structures template preview](https://www.moldraw.com/templates/resonance-structures.webp)**Resonance structures**Premium](https://www.moldraw.com/templates/resonance-structures/)[![Carbocation rearrangement template preview](https://www.moldraw.com/templates/carbocation-rearrangement.webp)**Carbocation rearrangement**Premium](https://www.moldraw.com/templates/carbocation-rearrangement/)[![Nitration of benzene template preview](https://www.moldraw.com/templates/aromatic-nitration.webp)**Nitration of benzene**Premium](https://www.moldraw.com/templates/aromatic-nitration/)[![Bromination of benzene template preview](https://www.moldraw.com/templates/aromatic-bromination.webp)**Bromination of benzene**Premium](https://www.moldraw.com/templates/aromatic-bromination/)[![Sulfonation of benzene template preview](https://www.moldraw.com/templates/aromatic-sulfonation.webp)**Sulfonation of benzene**Premium](https://www.moldraw.com/templates/aromatic-sulfonation/)[![Addition of HBr to an alkene template preview](https://www.moldraw.com/templates/hbr-addition.webp)**Addition of HBr to an alkene**Premium](https://www.moldraw.com/templates/hbr-addition/)[![Acid-catalysed hydration template preview](https://www.moldraw.com/templates/alkene-hydration.webp)**Acid-catalysed hydration**Premium](https://www.moldraw.com/templates/alkene-hydration/)[![Anti-Markovnikov addition of HBr template preview](https://www.moldraw.com/templates/radical-hbr-addition.webp)**Anti-Markovnikov addition of HBr**Premium](https://www.moldraw.com/templates/radical-hbr-addition/)[![Reduction with NaBH₄ template preview](https://www.moldraw.com/templates/nabh4-reduction.webp)**Reduction with NaBH₄**Premium](https://www.moldraw.com/templates/nabh4-reduction/)[![Cyanohydrin formation template preview](https://www.moldraw.com/templates/cyanohydrin-formation.webp)**Cyanohydrin formation**Premium](https://www.moldraw.com/templates/cyanohydrin-formation/)[![Aldol condensation template preview](https://www.moldraw.com/templates/aldol-condensation.webp)**Aldol condensation**Premium](https://www.moldraw.com/templates/aldol-condensation/) ## Frequently asked questions ### What is a curly-arrow mechanism template? A ready-made drawing of a reaction mechanism in which curved arrows show where electron pairs move in each step. You can open it in MolDraw, change the substrate and reuse it. ### Can I use these mechanisms in exams and worksheets? Yes. Open the template, delete the arrows you want students to draw, and export the result as a fill-in question. ### Are the mechanisms templates free? 3 of the 21 mechanisms templates are free to download. All of them can be previewed here and opened and edited in MolDraw; downloading the premium ones is part of MolDraw Pro. ## Other template categories [Name reactions](https://www.moldraw.com/templates/name-reactions/)[Resonance](https://www.moldraw.com/templates/resonance/)[Stereochemistry](https://www.moldraw.com/templates/stereochemistry/)[Catalytic cycles](https://www.moldraw.com/templates/catalytic-cycles/)[Pericyclic reactions](https://www.moldraw.com/templates/pericyclic-reactions/)[Biochemistry](https://www.moldraw.com/templates/biochemistry/)[Spectroscopy](https://www.moldraw.com/templates/spectroscopy/)[Research figures](https://www.moldraw.com/templates/research-figures/)[Lab safety](https://www.moldraw.com/templates/lab-safety/)[Lab notebook](https://www.moldraw.com/templates/lab-notebook/)[Teaching lab](https://www.moldraw.com/templates/teaching-lab/)[Lab reference cards](https://www.moldraw.com/templates/lab-reference-cards/)[Medicinal chemistry](https://www.moldraw.com/templates/medicinal-chemistry/)[Polymers](https://www.moldraw.com/templates/polymers/)[Organic](https://www.moldraw.com/templates/organic/)[Lab reference](https://www.moldraw.com/templates/lab-reference/)[Medicinal](https://www.moldraw.com/templates/medicinal/)[General chemistry](https://www.moldraw.com/templates/general-chemistry/)[Materials](https://www.moldraw.com/templates/materials/)[Natural products](https://www.moldraw.com/templates/natural-products/)[Physical chemistry](https://www.moldraw.com/templates/physical-chemistry/)[General & inorganic](https://www.moldraw.com/templates/general-and-inorganic/)[Reaction maps](https://www.moldraw.com/templates/reaction-maps/)[Graphene](https://www.moldraw.com/templates/graphene/)[COFs](https://www.moldraw.com/templates/cofs/)[MOFs](https://www.moldraw.com/templates/mofs/)[Dendrimers](https://www.moldraw.com/templates/dendrimers/)[Reaction setups](https://www.moldraw.com/templates/reaction-setups/) MolDraw Pro Download all 370 templates - Export the 291 premium templates as PNG, SVG or PDF - AI chemistry assistant - Structure scanning from images - Cloud save and teaching slides [See Pro plans](https://www.moldraw.com/pricing) Free templates stay free. Every template can be opened and edited in MolDraw.