Organic Chemistry Tutorial Videos

Enantiomeric Excess Percent Optical Purity Calculations and Logic

Enantiomeric Excess Percent Optical Purity in Series by Leah4sci

Enantiomeric excess percentage (aka optical purity percentage) calculations are one of the few equations you’ll come across in your orgo course. This video gives you a  step by step breakdown and practice examples. You’ll see how to find the percent excess via logic and see the numbers side by side. (Watch on YouTube: Optics 3. Click […]

Polarimetry in Optical Activity

Polarimetry Optical Activity in Chirality and Stereochemistry by Leah4sci

Polarimetry is the key to understanding chiral molecules in terms of optical activity. This video goes behind the scenes of the polarimeter to help you understand what plane polarized light has to do with chiral molecules. Part 1 (of 3) in this mini series explains + D and – L, dextrorotatory and levorotatory, and their (lack […]

Swap Method for finding R and S Configurations Chirality

swap method for r and s stereochemistry

Chirality/Stereochemistry Video Series: Video 4 R and S configurations are pretty straight-forward when priority group #4 is conveniently in the back of the molecule. There’s even a quick trick for when group #4 is forward (as taught in this video). But what happens when priority group #4 is in the plain of the page? Do […]

Friedel Crafts Alkylation vs Acylation EAS Reactions Tutorial Video

alkylation vs acylation by Leah4sci

EAS Series: Video 8 This video shows you a comparison of the Friedel-Crafts alkylation and acylation reactions, including the limitations of FC alkylation, and how to convert an acylation product to the reduced alkyl version. (Watch on YouTube: Alkylation v. Acylation. Click CC on bottom right for transcript.) <– Watch Previous Video: Friedel Crafts Acylation […]

Choosing SN1 SN2 E1 E2 Reaction Mechanism


This video provides a step by step walk through of a difficult SN1 SN2 E1 E2 mechanism when given a product. This question comes from a student’s practice exam where over 100 students failed to get full credit. You can learn how to ace questions like this by paying attention to the LOGIC more than just […]

Markovnikov vs Anti-Markovnikov in Alkene Addition Reactions

Markovnikov vs Anti-Markovnikov in Alkene Addition Reactions Tutorial by Leah4Sci for Organic Chemistry studentsv

Markovnikov’s Rule is a very important pattern to both understand and recognize when studying alkene addition reactions. What is Markovnikov’s rule all about and how does this impact regioselectivity in electrophilic addition reactions? As you follow along with my alkene reactions cheat sheet, you’ll notice that many reactions are labeled Mark or Anti-Mark and syn or […]

SN1 SN2 E1 E2 Reaction Mechanism Review

SN1 SN2 E1 E2 Reaction Mechanism Overview Video

SN1 SN2 E1 Series: Video 2 SN1 SN2 E1 E2 comprise the most difficult set of reactions you’ll learn in organic chemistry. The reactions themselves are simple enough but choosing which ones to use when can be tricky. This video will give you a quick overview/review of the individual reactions and mechanisms to prepare you […]

Resonance Structures of Benzene

Benzene Resonance step by step in Video Tutorial Series by leah4sci

Benzene is a unique molecule when it comes to resonance structures. This video will show you how to draw the ‘circle’ of resonance for benzene, as well as resonance intermediates for substituted aromatic compounds including Electron Donating Groups EDG which resonate into the ring and Electron Withdrawing Groups EWG which cause resonance out of the ring. […]

Newman Projection to Bond-Line Notation Trick Organic Chemistry

Newman Projection to Bond Line Notation Trick by Leah4Sci

Newman Projection Series: Video 5 Newman projections provide you with a unique perspective of analyzing atomic interactions in a molecule. However, converting between Newman Projection and Sawhorse can be somewhat tricky. This video teaches you a quick shortcut for when you need to quickly convert between Newman to Sawhorse or Sawhorse to Newman. (Watch on […]

Resonance Practice Problems for Organic Chemistry

Resonance Practice Problems for Organic Chemistry Tutorial Video

Think you know Resonance structures? Test your knowledge with my Resonance Structures Practice Quiz! Practice is ESSENTIAL to mastering Organic Chemistry. You have to be able to apply the skills you are learning. First, complete the Resonance Structures Practice Quiz, and then watch this video where I go over the first three question solutions and explanations step-by-step! (Watch […]