Chad makes Organic Chemistry understandable. Instead of merely memorizing reactions you'll actually understand the foundation of chemical reactivity, and Organic Chemistry will simply begin to make sense.

  • Video Lectures

    Comprehensive and yet to the point. Chad covers an entire year of organic chemistry (23 chapters) in less than 24 hours! The course includes 244 bite-size video lessons.

  • Powerpoint Slides

    All the associated slides used in the videos are included to facilitate note-taking.

  • Updated in 2018

    The curriculum was completely redesigned and a new set of videos released in 2018 with the goal of maximizing learning and efficiency!

Instructor

Chad McAllister

Chad McAllister

I have been helping science and pre-health students excel for more than two decades. I have spent most of the last 15 years managing the tutoring facility for the Chemistry department at one of the largest universities in the country and continue to work there to this day. I help thousands of students in person in large groups, in small groups, and one-on-one every semester and this site is my attempt to help far more. Chemistry and Physics are not as difficult as you think...I promise! Try one of my FREE or premium courses today! Happy Studying!

What Students Are Saying!

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First time I took organic chemistry I got a 58 on the first test. Now using this the second time around I got a 90. Suggested this to my teacher to recommend if students are having trouble.

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GREAT! 10/10! Would recommend!

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By far the best resource that I've come across.

By far the best resource that I've come across.

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VERY INFORMATIVE AND STRAIGHTFORWARD

Uyen Ha

I couldn't ask for a better study resource for general and organic chemistry. Believe me I took these two courses with the best professor at my university an...

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I couldn't ask for a better study resource for general and organic chemistry. Believe me I took these two courses with the best professor at my university and I got straight A+ in both courses. Chad's videos are very clear, straightforward, and informative. His lectures are professional but super easy to follow and understand along with the help from the chat forum. However if you want a quick respond from him, I suggest you to send him an email. He would try his best to help you fully understand the materials. I highly recommend you buy a subscription, which is super cheap comparing to other resources, to help you practice after each videos. I find it very helpful.

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Chad is awesome

Vuong Le

Chad is awesome x10000000

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Love this course !

Jung Choi

The best way to brush-up your Ochem foundation at a really low price !

The best way to brush-up your Ochem foundation at a really low price !

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USE CHAD TO GET AN A+

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Hey guys, so I found out about chad a few years ago when i was in high school and trying to get ahead. I used his videos for him to explain concepts and prob...

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Hey guys, so I found out about chad a few years ago when i was in high school and trying to get ahead. I used his videos for him to explain concepts and problems i could never understand in class. Now I am currently taking Organic chemistry and I havent been to class in over a month or two and only watch Chads videos and i still get almost perfect scores on the test. Chad is great. USE his videos and take notes.

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I wish I would known about this in Ochem 1

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I'm in the second part of Ochem this semester and these videos and reviews have helped me to fully understand and reinforce what I have learned in lecture wi...

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I'm in the second part of Ochem this semester and these videos and reviews have helped me to fully understand and reinforce what I have learned in lecture with my professor. I wish I would have known about this resource when I was in Ochem 1, I would have got a much better grade and would have actually understood the material. Thank you for all your help.

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Amazing

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I learned more from watching Chad's videos and doing his review quizzes than I ever have from other review sites/ books. He explains things in such a way tha...

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I learned more from watching Chad's videos and doing his review quizzes than I ever have from other review sites/ books. He explains things in such a way that they just "click."

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Chad is saving my chem courses!

tabby Shirbani

I just want to say thank you, because this course is the only thing that I needed for my ochem course!

I just want to say thank you, because this course is the only thing that I needed for my ochem course!

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paige willett

i have my first orgo test in a few days and i would be so lost if it weren't for these videos. i had no clue how to do chair flips and Newman projections unt...

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i have my first orgo test in a few days and i would be so lost if it weren't for these videos. i had no clue how to do chair flips and Newman projections until i watched these videos

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Organic Chem with Chad

Sydney Finster

One of the best (if not the best) professors I have learned from. Highly recommend this course to learn and actually understand the material. If that doesn't...

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One of the best (if not the best) professors I have learned from. Highly recommend this course to learn and actually understand the material. If that doesn't convince you then sign up just to see his t-shirts! :p

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An Answer to Prayer

Katherine Saaid

This course has been a phenomenal help! The way you explain the concepts makes them easy to understand and remember because your goal is understanding. The ...

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This course has been a phenomenal help! The way you explain the concepts makes them easy to understand and remember because your goal is understanding. The many examples throughout the lecture helps solidify the concepts, as do the practice questions. Although Organic Chem is a subject that tends to fly over my head (and at least a few others), you do well in not making it complicated, but rather simplify it and ease students in understanding this foreign language. In terms of function and aesthetics, the website is great! Une grande aide! Much thanks!

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Chad's Ultimate Organic Chemistry Review

Quizzes, Practice Final Exams, Video Solutions, Comprehensive Outlines, Reaction Summaries and more!

Course Curriculum

  • 1

    Getting the Most Out of the Course

    • Getting the Most Out of the Course
  • 2

    Chapter 1 - Electrons, Bonding, and Molecular Properties

    • A Note Regarding the Updated Video Series
    • Chapter 1 Slides
    • 1.1 Lewis Structures (11:04)
    • 1.2 Formal Charges (4:09)
    • 1.3 Valence Bond Theory and Hybridization (17:29)
    • Molecular Structure and Bonding (14 Questions)
    • 1.4 Molecular Orbital Theory (14:14)
    • 1.5 Polarity (6:38)
    • 1.6 Intermolecular Forces (20:16)
    • Intermolecular Forces (13 Questions)
  • 3

    Chapter 2 - Molecular Representations and Resonance

    • Chapter 2 Slides
    • 2.1 Condensed Structures (11:36)
    • 2.2 Bond-Line Structures (15:25)
    • 2.3a Resonance (17:40)
    • 2.3b Resonance and Hybridization (5:33)
    • Resonance (10 Questions)
  • 4

    Chapter 3 - Acids and Bases

    • Chapter 3 Slides
    • 3.1 Introduction to Acids and Bases (9:01)
    • 3.2 Ranking Bases (14:51)
    • 3.3 Ranking Acids (8:28)
    • Acids and Bases (17 Questions)
    • Acids and Bases Quiz Extra Practice (15 Questions)
  • 5

    Chapter 4 - Alkanes

    • Chapter 4 Part 1 Slides - Nomenclature of Alkanes
    • Chapter 4 Part 2 Slides - Constitutional Isomers and Conformations of Alkanes
    • 4.1a Nomenclature of Alkanes (15:32)
    • 4.1b Nomenclature of CycloAlkanes (8:20)
    • 4.1c Systematic Nomenclature of Complex Substituents (4:22)
    • 4.1d Common Names of Complex Substituents (7:52)
    • 4.1e Nomenclature of Bicyclic Compounds (5:44)
    • 4.2 Drawing Constitutional Isomers (6:18)
    • 4.3 Newman Projections (8:20)
    • 4.4 Cycloalkanes and Cyclohexane Chair Conformations (22:38)
  • 6

    Chapter 5 - Isomers and Stereochemistry

    • Chapter 5 Slides
    • 5.1 Overview of Isomerism (7:23)
    • 5.2 Chiral Centers and Chirality (5:22)
    • 5.3 Absolute Configurations - Assigning R and S (14:46)
    • 5.4 Molecules with Multiple Chiral Centers (15:15)
    • 5.5 Fischer Projections (6:13)
    • 5.6 Determining the Relationship Between a Pair of Molecules (6:43)
    • 5.7 Amine Inversion and Chiral Molecules Without Chiral Centers (5:23)
    • 5.8 Optical Activity (7:39)
  • 7

    Chapter 6 - Introduction to Organic Reactions and Mechanisms

    • Chapter 6 Slides
    • 6.1 Reaction Enthalpies and Bond Dissociation Energies (6:11)
    • 6.2 Entropy, Gibbs Free Energy, and the Equilibrium Constant (9:43)
    • 6.3 The Kinetics of Organic Reactions (4:41)
    • 6.4 Nucleophiles, Electrophiles, and Intermediates (5:43)
    • 6.5 Reaction Mechanisms and Curved Arrow Pushing (7:11)
  • 8

    Chapter 7 - Substitution and Elimination Reactions of Alkyl Halides

    • Chapter 7 Part 1 Slides
    • Chapter 7 Part 2 Slides
    • 7.1a Introduction to SN2 Reactions (9:14)
    • 7.1b Factors Affecting SN2 Reactions (11:39)
    • 7.2a Introduction to SN1 Reactions (4:44)
    • 7.2b Carbocation Rearrangements in SN1 Reactions (8:29)
    • 7.2c Racemization in SN1 Reactions (1:36)
    • 7.2d Factors Affecting SN1 Reactions (4:50)
    • 7.3 Unreactivity of Vinyl and Aryl Halides (2:08)
    • 7.4 Predicting the Products of Substitution Reactions (18:04)
    • 7.5 Nomenclature of Alkenes (15:17)
    • 7.6 Stability of Alkenes (2:17)
    • 7.7a Introduction to E2 Elimination Reactions (6:41)
    • 7.7b Exceptions to Zaitsev's Rule for E2 Reactions (8:37)
    • 7.7c The Stereospecificity of E2 Reactions -- Anti-periplanar (10:40)
    • 7.8 Introduction to E1 Elimination Reactions (4:54)
    • 7.9 Predicting the Products of Elimination Reactions (10:01)
    • 7.10 Distinguishing Between Substitution and Elimination Reactions (16:52)
  • 9

    Chapter 8 - Addition Reactions to Alkenes

    • Chapter 8 Slides
    • 8.1 Introduction to Alkene Addition Reactions (3:59)
    • 8.2 Hydrohalogenation (5:06)
    • 8.3a Hydration -- Acid-Catalyzed Hydration (3:24)
    • 8.3b Hydration -- Oxymercuration-Demercuration (6:06)
    • 8.3c Hydration -- Hydroboration-Oxidation (4:13)
    • 8.4a Acid-Catalyzed Addition of an Alcohol (2:24)
    • 8.4b Alkoxymercuration-Demercuration (1:14)
    • 8.5 Catalytic Hydrogenation (3:16)
    • 8.6a Halogenation (3:54)
    • 8.6b Halohydrin Formation (3:19)
    • 8.7a Anti-Dihydroxylation (4:11)
    • 8.7b Syn-Dihydroxylation (2:39)
    • 8.8 Predicting the Products of Alkene Addition Reactions (10:17)
    • 8.9 Oxidative Cleavage -- Ozonolysis and Permanganate Cleavage (4:48)
  • 10

    Chapter 9 - Alkynes

    • Chapter 9 Slides
    • 9.1 Nomenclature of Alkynes (3:47)
    • 9.2 Acidity of Alkynes (2:31)
    • 9.3 Preparation of Alkynes (2:57)
    • 9.4 Reduction of Alkynes (6:00)
    • 9.5 Introduction to Addition Reactions of Alkynes (2:18)
    • 9.6 Hydrohalogenation (3:16)
    • 9.7 Halogenation (1:34)
    • 9.8a Acid-Catalyzed Hydration (4:09)
    • 9.8b Hydroboration-Oxidation (5:06)
    • 9.8c Keto-Enol Tautomerization (3:57)
    • 9.9 Ozonolysis (1:20)
    • 9.10 Alkylation of Acetylide Ions (2:20)
  • 11

    Chapter 10 - Radical Reactions

    • Chapter 10 Slides
    • 10.1 Introduction to Free Radical Halogenation (4:01)
    • 10.2 Free Radical Chlorination vs Bromination (5:51)
    • 10.3 The Mechanism of Free Radical Halogenation (7:51)
    • 10.4 Allylic and Benzylic Bromination Using NBS (7:13)
    • 10.5 Hydrobromination of Alkenes with Peroxide (4:22)
  • 12

    Chapter 11 - Synthesis

    • Chapter 11 Slides
    • 11.1 Functional Group Conversions (4:18)
    • 11.2 Increasing the Length of the Carbon Skeleton (8:06)
    • 11.3 Decreasing the Length of the Carbon Chain or Opening a Ring (2:42)
    • 11.4a Common Patterns in Synthesis Part 1 (5:24)
    • 11.4b Common Patterns in Synthesis Part 2 (8:50)
    • 11.4c Common Patterns in Synthesis Part 3 (5:20)
    • 11.4d Common Patterns in Synthesis Part 4 (9:45)
  • 13

    Chapter 12 - Alcohols

    • Chapter 12 Slides
    • 12.1 Properties and Nomenclature of Alcohols (4:46)
    • 12.2 Acidity of Alcohols and Phenols (13:07)
    • 12.3a Synthesis of Alcohols; Reduction of Ketones and Aldehydes (8:05)
    • 12.3b Synthesis of Alcohols; Grignard Addition (8:18)
    • 12.4 Protecting Alcohols (5:44)
    • 12.5a Substitution with HCl, HBr, and HI (4:22)
    • 12.5b Substitution with PBr3 and SOCl2 (5:04)
    • 12.5c Formation of Tosylate Esters (3:36)
    • 12.6 Elimination (Dehydration) (3:14)
    • 12.7 Oxidation with Chromic Acid and PCC (9:25)
  • 14

    Chapter 13 - Ethers, Epoxides, Thiols, and Sulfides

    • Chapter 13 Slides
    • 13.1 Introduction to and Nomenclature of Ethers (2:42)
    • 13.2 Crown Ethers (2:02)
    • 13.3 Synthesis and Reactions of Ethers (6:34)
    • 13.4 Nomenclature of Epoxides (2:59)
    • 13.5 Synthesis of Epoxides (4:09)
    • 13.6 Ring Opening of Epoxides (4:49)
    • 13.7 Nomenclature, Synthesis, and Reactions of Thiols (4:37)
    • 13.8 Nomenclature, Synthesis, and Reactions of Sulfides (2:51)
  • 15

    Chapter 14 - IR Spectroscopy and Mass Spectrometry

    • Chapter 14 Part 1 Slides - IR Spectroscopy
    • Chapter 14 Part 2 Slides - Mass Spectrometry
    • 14.1 Introduction to IR Spectroscopy (10:56)
    • 14.2a IR Spectra of Carbonyl Compounds (6:27)
    • 14.2b The Effect of Conjugation on the Carbonyl Stretching Frequency (5:57)
    • 14.3 Interpreting More IR Spectra (6:45)
    • 14.4 Introduction to Mass Spectrometry (6:19)
    • 14.5 Isotope Effects in Mass Spectrometry (6:29)
    • 14.6a Fragmentation Patterns of Alkanes, Alkenes, and Aromatic Compounds (6:19)
    • 14.6b Fragmentation Patterns for Alkyl Halides, Alcohols, and Amines (4:56)
    • 14.6c Fragmentation Patterns for Ketones and Aldehydes (3:45)
  • 16

    Chapter 15 - NMR Spectroscopy

    • Chapter 15 Part 1 Slides -- The Number of Signals
    • Chapter 15 Part 1 Slides -- Interpreting NMR
    • 15.1 Introduction to NMR (2:45)
    • 15.2 The Number of Signals in C-13 NMR (4:52)
    • 15.3 The Number of Signals in Proton NMR (10:37)
    • 15.4 Homotopic vs Enantiotopic vs Diastereotopic (10:15)
    • 15.5a The Chemical Shift in C-13 and Proton NMR (8:40)
    • 15.5b The Integration or Area Under the Signal in Proton NMR (1:46)
    • 15.5c The Splitting or Multiplicity in Proton NMR (4:55)
    • 15.6a Interpreting NMR Example 1 (5:10)
    • 15.6b Interpreting NMR Example 2 (7:43)
    • 15.6c Interpreting NMR Example 3 (3:53)
    • 15.6d Structural Determination From All Spectra Example 4 (5:58)
    • 15.6e Structural Determination From All Spectra Example 5 (8:47)
    • 15.7 Complex Splitting (11:42)
  • 17

    Chapter 16 - Conjugated Pi Systems

    • Chapter 16 Slides Part 1 - Conjugated Pi Systems
    • Chapter 16 Slides Part 2 - Pericyclic Reactions
    • 16.1 Introduction to Conjugated Systems and Heats of Hydrogenation (8:19)
    • 16.2a Introduction to Pi Molecular Orbitals - Ethylene (6:57)
    • 16.2b Pi Molecular Orbitals - 1,3-Butadiene (6:17)
    • 16.2c Pi Molecular Orbitals - the Allyl System (5:14)
    • 16.2d Pi Molecular Orbitals - 1,3,5-Hexatriene (5:30)
    • 16.3 UV-Vis Spectroscopy (1:50)
    • 16.4 Addition Reactions to Conjugated Dienes (10:50)
    • 16.5a Introduction to Diels-Alder Reactions (7:42)
    • 16.5b Stereoselectivity and Regioselectivity in Diels-Alder Reactions (11:58)
    • 16.5c Diels-Alder Reactions with Cyclic Dienes (10:03)
    • 16.5d Conservation of Orbital Symmetry in Diels-Alder Reactions (3:40)
    • 16.6 Cycloaddition Reactions (9:38)
    • 16.7 Electrocyclic Reactions (14:19)
    • 16.8 Sigmatropic Rearrangements (6:14)
  • 18

    Chapter 17 - Aromatic Compounds

    • Chapter 17 - Slides
    • 17.1 Nomenclature of Benzenes (9:48)
    • 17.2a Criteria for Aromatic Compounds (5:02)
    • 17.2b Aromatic vs Nonaromatic vs Antiaromatic (15:56)
    • 17.3 The Effects of Aromaticity on SN1 Reactions and Acidity-Basicity (4:00)
    • 17.4 Aromaticity and Molecular Orbital Theory (8:23)
  • 19

    Chapter 18 - Reactions of Aromatic Compounds

    • Chapter 18 Slides
    • 18.1 Introduction to Aromatic Substitution Reactions (6:27)
    • 18.2a EAS - Bromination and Chlorination (4:37)
    • 18.2b EAS - Sulfonation and Desulfonation (2:25)
    • 18.2c EAS - Nitration (2:56)
    • 18.2d EAS - Friedel-Crafts Alkylation and Acylation (10:35)
    • 18.2e EAS - Activating and Deactivating Groups and Ortho-Para and Meta Directors (12:07)
    • 18.2f EAS - Predicting the Products of EAS Reactions (5:17)
    • 18.3 Catalytic Hydrogenation and the Birch Reduction (2:12)
    • 18.4a Side-Chain Oxidation with Permanganate or Chromic Acid (1:35)
    • 18.4b Benzylic Bromination with NBS (1:15)
    • 18.4c The Clemmensen and Wolff Kishner Reductions (5:12)
    • 18.4d - Side-Chain General Reduction (1:26)
    • 18.5 Nucleophilic Aromatic Substitution (6:40)
  • 20

    Chapter 19 - Ketones and Aldehydes

    • Chapter 19 Slides
    • 19.1 Nomenclature of Ketones and Aldehydes (5:33)
    • 19.2 Synthesis of Ketones and Aldehydes (3:15)
    • 19.3 Introduction to Nucleophilic Addition Reactions (6:37)
    • 19.4 Hydration (Addition of Water) (3:06)
    • 19.5a Addition of Alcohols (7:16)
    • 19.5b Cyclic Acetals as Protecting Groups (4:25)
    • 19.6a Addition of Primary Amines (Imine Formation) (6:19)
    • 19.6b Addition of Secondary Amines (Enamine Formation) (4:31)
    • 19.6c Mechanism for the Wolff Kishner Reduction (4:45)
    • 19.7 Reduction via Thioacetals (1:16)
    • 19.8 Hydride Reduction Reactions (2:42)
    • 19.9a Addition of Acetylide Ions and Grignard Reagents (1:09)
    • 19.9b Addition of HCN (Cyanohydrin Formation) (1:01)
    • 19.9c The Wittig Reaction (5:18)
    • 19.10 Baeyer-Villiger Oxidation (2:51)
    • 19.11 Patterns in Synthesis (12:32)
  • 21

    Chapter 20 - Carboxylic Acids and Acid Derivatives

    • Chapter 20 Slides
    • 20.1 Introduction to and Physical Properties of Carboyxylic Acids and Acid Derivatives (3:46)
    • 20.2a Nomenclature of Carboxylic Acids (2:25)
    • 20.2b Nomenclature of Acid Halides (0:50)
    • 20.2c Nomenclature of Acid Anhydrides (1:20)
    • 20.2d Nomenclature of Esters (1:45)
    • 20.2e Nomenclature of Amides (1:04)
    • 20.2f Nomenclature of Nitriles (0:43)
    • 20.3 Introduction to Nucleophilic Acyl Substitution (4:08)
    • 20.4 Reaction with Organometallic Reagents (3:27)
    • 20.5 Hydride Reduction (9:45)
    • 20.6 Interconversion of Carboxylic Acids and Derivatives (6:58)
    • 20.7 The Mechanisms of Nucleophilic Acyl Substitution (7:51)
    • 20.8a Synthesis of Acid Halides (3:33)
    • 20.8b Reactions of Acid Halides (3:24)
    • 20.9 Synthesis and Reactions of Acid Anhydrides (2:41)
    • 20.10a Synthesis of Esters (6:00)
    • 20.10b Reactions of Esters (5:06)
    • 20.11 Synthesis and Reactions of Carboxylic Acids (5:51)
    • 20.12 Synthesis and Reactions of Amides (1:53)
    • 20.13 Synthesis and Reactions of Nitriles (3:31)
    • 20.14 Patterns in Synthesis (9:16)
    • A Little Help
  • 22

    Chapter 21 - Substitution Reactions at the Alpha Carbon

    • Chapter 21 Slides
    • 21.1 Acidity of the Alpha Hydrogen
    • 21.2 General Mechanisms of Alpha Substitution Reactions
    • 21.3a Alpha Halogenation
    • 21.3b The Haloform Reaction
    • 21.3c The HVZ Reaction
    • 21.4a Alpha Alkylation
    • 21.4b The Stork Synthesis
    • 21.5a Introduction to Aldol Reactions
    • 21.5b Mechanisms of Aldol Reactions
    • 21.5c Mixed Aldol Reactions
    • 21.5d Intramolecular Aldol Reactions
    • 21.6a Claisen Condensation Reactions
    • 21.6b Dieckmann Condensation Reactions
    • 21.7a Beta-Decarboxylation
    • 21.7b The Malonic Ester Synthesis
    • 21.7c The Acetoacetic Ester Synthesis
    • 21.8 Michael Reactions
    • 21.9 The Robinson Annulation
    • 21.10 Patterns in Synthesis
  • 23

    Chapter 22 - Amines

    • Chapter 22 Slides
    • 22.1 Classification of Amines (2:15)
    • 22.2 Nomenclature of Amines (4:15)
    • 22.3 Basicity of Amines (2:18)
    • 22.4a Synthesis of Amines - Reduction (1:56)
    • 22.4b Synthesis of Amines - Hofmann Rearrangement (3:07)
    • 22.4c Synthesis of Amines - Curtius Rearrangement and Schmidt Reaction (2:07)
    • 22.4d Synthesis of Amines - Gabriel Synthesis (4:08)
    • 22.4e Synthesis of Amines - Reductive Amination (1:50)
    • 22.5 Acylation (0:58)
    • 22.6 Hofmann Elimination (3:59)
    • 22.7 Cope Elimination (1:04)
    • 22.8a Reaction with Nitrous Acid and the Sandmeyer Reactions (1:59)
    • 22.8b Azo Coupling (1:17)
    • 22.9 EAS Reactions with Nitrogen Heterocycles (2:18)
    • 22.10 Patterns in Synthesis (9:57)
  • 24

    Practice Final Exams

    • Nomenclature Review Quiz (18 Questions)
    • Practice Final Exam #1 (50 Questions)
    • Practice Final Exam #2 (50 Questions)
    • Practice Final Exam #3 (50 Questions)