S configuration Memes

The ultimate stereochemistry standoff! In organic chemistry, R and S configurations are mirror images of each other (enantiomers) that can never superimpose - just like these identical figures pointing at each other. The Cahn-Ingold-Prelog rules determine whether a chiral center gets labeled R (rectus/right) or S (sinister/left), but these molecules are literally the same compound with atoms arranged in opposite spatial orientations. Chemists spend hours staring at molecules trying to assign these configurations correctly, and then these sneaky enantiomers go and have identical physical properties except when interacting with other chiral objects. The molecular equivalent of the Spider-Man pointing meme!