Have you ever wondered why the gas station has “unleaded fuel” but there isn’t a “leaded” option? The answer has to do with a chemical called tetraethyl lead, which is an organometallic compound, or an organic compound with a...

In this episode of Crash Course Chemistry, Hank discusses what Molecules actually look like and why, some quantum-mechanical three dimensional wave functions are explored, he touches on hybridization, and delves into sigma and pi...

Models are great, except they're also usually inaccurate. In this episode of Crash Course Chemistry, Hank discusses why we need models in the world and how we can learn from them... even when they're almost completely wrong....

We’ve all heard the phrase “opposites attract.” It may or may not be true for people, but it’s definitely true in organic chemistry. In this episode of Crash Course Organic Chemistry, we’re learning about electronegativity, polarity,...

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...

The organic molecules that make up life on Earth are more than just the 2-D structures we’ve been drawing so far. Molecules have 3-D shapes that help us understand what they can do. In this episode of Crash Course Organic Chemistry,...

Organic chemistry is pretty much everywhere! In this episode of Crash Course Organic Chemistry, we’re talking about the amazing diversity among organic molecules. We’ll learn about the origins of organic chemistry, how to write Lewis...

The Valence Shell Electron Pair Repulsion (VSEPR) theory predicts molecular shapes by focusing on the repulsion between electron pairs surrounding a central atom. The main postulates include: Electron Pair Repulsion: Electron pairs...

Selenophosphate Synthetase: Physiology, Biochemistry, and Mechanism

In this video, we will determine the Lewis structure for a given compound.<br/>

Halohydrin Formation: Theory, Mechanism, Examples

Organic Chemistry Practice Exam 10

Organic Chemistry Practice Exam 8

Which ones are aromatic? Take your pick! Don't forget about Huckel's rule.

Alkene Halogenation: Theory, Mechanism, Examples

Abstract Intuition for Resonance and Delocalization

In this video, we will determine the Lewis structure for the compound, CHCl3 (chloroform).<br/>

Identifying Regions of Molecule with Resonance