Isomer Explorer

Compare molecules side-by-side to classify their isomeric relationship.

Butane vs Isobutane

C₄H₁₀

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What Are Isomers?

Two molecules with the same formula but different structures. Are they the same compound?

Isomer Classification Flowchart

1. Same formula? If no → not isomers

2. Same connectivity? If no → constitutional isomers

3. Mirror images? If yes → enantiomers

4. Not mirror images? → diastereomers (includes cis/trans, meso)

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About This Pair

Butane vs Isobutane

Same molecular formula (C₄H₁₀) but different connectivity. Butane is a straight chain; isobutane is branched.

Constitutional Isomers

Isomer Classification

Constitutional IsomersSame formula, different connectivity
EnantiomersNon-superimposable mirror images
DiastereomersStereoisomers that aren't mirror images
Cis/Trans IsomersDifferent arrangement around C=C
Meso CompoundStereocenters + internal mirror plane