Crash Course
More EAS - Electron Donating and Withdrawing Groups: Crash Course Organic Chemistry
In the previous episode we discussed what happens when we use electrophilic aromatic substitution to add a group to a benzene ring, but what happens when you try to add even more groups? Well, things get a little more complicated. In...
Curated Video
Rules for Writing Resonating Structures: Get Them Right!
When writing resonance structures, it's essential to follow certain rules: only electrons move, not atoms; all structures must have valid bonding; and charges should be minimized. These guidelines ensure resonance structures accurately...
Curated Video
Conditions for Resonance: Why Acetamide and Carbonate Matter
Resonance requires specific conditions for electron delocalization. The molecule must have a conjugated system with alternating single and double bonds, and atoms must be capable of sharing electrons. Acetamide and the carbonate ion are...
Curated Video
Resonance in Action: Bond Length, Acidity & More!
Resonance has far-reaching effects on molecular properties. It can equalize bond lengths, making double bonds longer and single bonds shorter than expected. It also stabilizes charged species, influencing acidity and basicity. For...
Curated Video
Pi-n Conjugation: Unlocking the Secrets of Molecular Stability
Pi-n conjugation occurs when a lone pair of electrons (n) interacts with a pi system, enhancing electron delocalization. This conjugation stabilizes the molecule, as the lone pair contributes to the overall resonance. Pi-n conjugation...
Professor Dave Explains
Organocuprates (Gilman Reagents)
We've seen organometallic reagents featuring magnesium, as well as lithium, so how about copper? These are called organocuprates, or sometimes Gilman reagents. What do they look like? How do we make them? What do we do? Let's take a look!
Professor Dave Explains
Addition on Conjugated Polyunsaturated Systems
Looking at how addition reactions occur on conjugated polyunsaturated systems.
Professor Dave Explains
Diazomethane Synthesis and Applications (Arndt-Eistert Homologation)
In learning about carbenes, we discovered the importance of diazomethane. So it will be a good idea to learn how to make this molecule, as well as some other things we can do with it, including something called the Arndt-Eistert...
Professor Dave Explains
Aldol Condensation
Introducing aldol condensation and enolate chemistry in general.
Professor Dave Explains
Practice Problem: Site of Protonation on a Weak Base
For this one we will need to understand the basics about Bronsted-Lowry acid-base reactions, and we also should be able to gauge the stability of various potential conjugate bases.
Professor Dave Explains
Resonance Structures/Assigning Formal Charge
Looking at resonance structures for organic molecules and learning how to determine formal charge.
Professor Dave Explains
Ortho/Meta/Para Directors
A discussion of ortho/para directing and meta directing behavior amongst substituted benzenes.
Khan Academy
Khan Academy: Relative Stability of Amides, Esters, Anhydrides & Acyl Chlorides
Sal Khan visually explains the relative stability of amides, esters, anhydrides, and acyl chlorides. [11:08]