Chiral Molecules Visualization

Interactive demonstration of chirality, enantiomers, Cahn-Ingold-Prelog (CIP) rules, R/S configuration, and optical rotation

3D Chiral Molecule

Configuration: R
Enantiomer: (R)- glyceraldehyde

Mirror Image (Enantiomer)

MIRROR

Optical Activity - Polarized Light

Rotation: Dextrorotatory (+)
Observed Rotation: 0°

Cahn-Ingold-Prelog (CIP) Priority Rules

1 -OH Highest Priority
2 -CHO
3 -CH₂OH
4 -H Lowest Priority (away)

View from the side opposite the lowest priority group (4). If the sequence 1→2→3 is clockwise, the configuration is R (Rectus). If counterclockwise, it's S (Sinister).

Parameters

Display Options

Key Concepts

Chirality: Molecule with non-superimposable mirror image
CIP Rules: Priority based on atomic number (higher Z = higher priority)
R Configuration: Clockwise 1→2→3 when priority 4 is away
S Configuration: Counter-clockwise 1→2→3 when priority 4 is away
Optical Activity: Rotation of plane-polarized light (+ or -)

What is Chirality?

Chirality is a geometric property of molecules where they cannot be superimposed on their mirror image, similar to how left and right hands are non-superimposable mirror images. A chiral molecule has a chiral center (usually a carbon atom) bonded to four different groups.

Cahn-Ingold-Prelog (CIP) Priority Rules

The CIP system assigns priority to substituents based on atomic number: higher atomic number = higher priority. When atoms are identical, look at the next atoms in the chain.

R Configuration (Rectus)

R configuration occurs when the three highest priority substituents are arranged clockwise when viewed from the side opposite the lowest priority group.

S Configuration (Sinister)

S configuration occurs when the three highest priority substituents are arranged counterclockwise when viewed from the side opposite the lowest priority group.

Optical Activity and Polarized Light

Optical activity is the ability of chiral molecules to rotate the plane of plane-polarized light. If rotation is clockwise, it's dextrorotatory (+); if counterclockwise, levorotatory (-).

Enantiomers and Racemic Mixtures

Enantiomers are pairs of chiral molecules that are non-superimposable mirror images. A 50:50 mixture is called a racemic mixture.

Applications

Understanding chirality is crucial in pharmaceuticals, biology, food chemistry, materials science, and analytical chemistry.