Three kinds of isomerism
Same formulas, different molecules. Top: C₄H₁₀ chain isomers. Middle: cis/trans but-2-ene. Bottom: enantiomers of CHBrClF. Drag to rotate each pair and convince yourself they cannot be superposed.
Same formulas, different molecules. Top: C₄H₁₀ chain isomers. Middle: cis/trans but-2-ene. Bottom: enantiomers of CHBrClF. Drag to rotate each pair and convince yourself they cannot be superposed.