 Cahn–Ingold–Prelog priority rules

The Cahn–Ingold–Prelog priority rules are a set of guidelines used to assign priority to substituents attached to a chiral center in organic molecules. These rules are crucial for determining the configuration (R or S) of chiral centers in stereochemistry. Here's a summary of how the rules work: 1. **Atomic Number**: Compare the atomic numbers of the atoms directly attached to the chiral center. The substituent with the higher atomic number takes precedence.