Chirality/Stereochemistry Video Series: Video 5
R and S configurations are found by ranking substituents on a chiral carbon. This is relatively straight-forward when substituents contain 1-3 atoms.
This gets more confusing when the substituents are long, complex, and contain many of the same atoms. This orgo tutorial video shows you how to approach lengthy and complex substituents so that you can quickly and easily determine R and S configurations.
(Watch on YouTube: Substituents. Click cc on bottom right for video transcription.)