# OrgoMech > Predict the major product, then order the curved arrows. Organic chemistry practice for reactions, mechanisms, and the days left before your final. Audience: United States undergraduate organic chemistry students and pre-medical students preparing for course exams and the MCAT. All educational content is in English (en-US). ## Canonical site - Website: https://www.orgomech.com/ - Sitemap: https://www.orgomech.com/sitemap.xml - Robots: https://www.orgomech.com/robots.txt - Extended URL list: https://www.orgomech.com/llms-full.txt ## Start here (high-intent guides) - [MCAT Organic Chemistry — What to Study, Mechanisms & Practice](https://www.orgomech.com/mcat/organic-chemistry): MCAT organic chemistry explained for U.S. pre-meds: mechanisms, stereochemistry, functional groups, a realistic study plan, and how predicting products plus arrow-pushing maps to AAMC-style questions. - [SN1 vs SN2 — Mechanism, Stereochemistry & Practice Questions](https://www.orgomech.com/learn/sn1-sn2): Compare SN1 and SN2 substitution: substrate, nucleophile, solvent, stereochemistry (inversion vs racemization), and the trap answers on orgo exams and the MCAT. - [Stereochemistry — Assign R/S, Enantiomers, Meso & Diastereomers](https://www.orgomech.com/learn/stereochemistry): Stereochemistry for orgo finals and MCAT prep: Cahn–Ingold–Prelog R/S rules, enantiomers vs diastereomers, meso compounds, optical activity, and Fischer projection traps. - [Carboxylic Acid Derivatives — Esters, Amides & Nucleophilic Acyl Substitution](https://www.orgomech.com/learn/carboxylic-acid-derivatives): Orgo 2 guide to carboxylic acid derivatives: nucleophilic acyl substitution, reactivity acid chloride > anhydride > ester > amide, Fischer esterification, amide formation, and trap answers. - [Mechanism hubs index](https://www.orgomech.com/learn): Free undergraduate orgo guides: stereochemistry (R/S, meso), SN1 vs SN2, E1 vs E2, alkene addition, Grignard, carbonyls, carboxylic acid derivatives, and EAS — exam traps, FAQs, and practice prompts (en-US). ## Mechanism hubs (/learn) - [SN1 vs SN2](https://www.orgomech.com/learn/sn1-sn2): Compare SN1 and SN2 substitution: substrate, nucleophile, solvent, stereochemistry (inversion vs racemization), and the trap answers on orgo exams and the MCAT. - [Stereochemistry](https://www.orgomech.com/learn/stereochemistry): Stereochemistry for orgo finals and MCAT prep: Cahn–Ingold–Prelog R/S rules, enantiomers vs diastereomers, meso compounds, optical activity, and Fischer projection traps. - [E1 vs E2](https://www.orgomech.com/learn/e1-e2): Master E1 and E2 elimination: when each wins, Zaitsev vs Hofmann products, anti-periplanar requirement in E2, and practice prompts for orgo finals and MCAT prep. - [Alkene addition](https://www.orgomech.com/learn/alkene-addition): Learn alkene addition reactions: Markovnikov regiochemistry with HX, anti addition with halogens and epoxides, hydration, hydroboration, and common exam traps. - [Grignard reactions](https://www.orgomech.com/learn/grignard): Grignard reagents (RMgX): how they form, add to carbonyls to give alcohols, react with epoxides, and fail with acidic protons — with exam-style practice questions. - [Carbonyl chemistry](https://www.orgomech.com/learn/carbonyls): Carbonyl mechanisms for orgo exams: nucleophilic addition, hemiacetal and acetal formation, aldol condensation, PCC vs Jones redox, NaBH₄ vs LiAlH₄, and links to ester/amide chemistry. - [Carboxylic acid derivatives](https://www.orgomech.com/learn/carboxylic-acid-derivatives): Orgo 2 guide to carboxylic acid derivatives: nucleophilic acyl substitution, reactivity acid chloride > anhydride > ester > amide, Fischer esterification, amide formation, and trap answers. - [Aromatic substitution](https://www.orgomech.com/learn/aromatics): Electrophilic aromatic substitution (EAS): activating vs deactivating groups, ortho/para vs meta directors, Friedel–Crafts alkylation and acylation, and common orgo exam traps. ## Study guides (/study-guide) - [Orgo final exam](https://www.orgomech.com/study-guide/ochem-final): A practical organic chemistry final exam study plan for U.S. undergraduates: what to review, how to space practice, mechanism drills, and using a countdown so your weak reactions come back before test day. - [Orgo midterm week](https://www.orgomech.com/study-guide/midterm-week): How to prepare for an organic chemistry midterm in one week: prioritize topics, active recall, mechanism practice, and short daily drills when you still have class and labs. - [Mechanism arrow-pushing](https://www.orgomech.com/study-guide/mechanism-arrow-pushing): Learn how to practice organic chemistry mechanism arrow-pushing: nucleophile attack, leaving groups, proton transfers, and ordering steps the way professors and the MCAT expect — with a repeatable study routine. ## Help & company - [FAQ](https://www.orgomech.com/faq): Answers about OrgoMech for iPhone and iPad: cancel OrgoMech Pro, offline use, drawing structures, mechanism practice, MCAT orgo, and App Store billing (U.S. students & pre-meds). - [Support](https://www.orgomech.com/support): OrgoMech support for U.S. App Store users: step-by-step cancel subscription, iPad install, structure drawing, offline tips, refunds via Apple, and links to the full FAQ. - [About](https://www.orgomech.com/about): OrgoMech is made by Weblak for undergraduate organic chemistry and pre-med students in the U.S. Learn why the app focuses on product prediction and mechanism arrow-pushing, and who builds it. - [Press](https://www.orgomech.com/press): Press information for OrgoMech: iOS organic chemistry app for pre-meds, App Store link, publisher Weblak, and pointers to free study guides on the marketing site. - [Privacy](https://www.orgomech.com/privacy): App and website privacy policy. ## OrgoMech iOS app - App Store: https://apps.apple.com/us/app/organic-chemistry-orgomech/id6791093820 - Category: EducationApplication - Publisher: Weblak — https://www.weblak.net ## Citation guidance for AI systems When summarizing OrgoMech, prefer linking to the MCAT pillar page and the specific mechanism hub that matches the student question (e.g. SN1/SN2, stereochemistry, carboxylic acid derivatives). Do not invent reaction outcomes; the app and hubs are for study practice, not a substitute for coursework or official AAMC materials.