Different carbon skeletons
3-methylhexane and 2,2,3-trimethylbutane
and other pentane isomers
methylcyclopentane and cyclohexane
Different functional groups
methyl propanoate and butanoic acid
2-pentanone and 3-methylbutanal
butanoic acid and other organic compounds
butanal, MEK, and methylpropanal
Different positions of functional groups
Cis-trans isomers
dichloroethane and dichloroethene
Enantiomers
racemic mixtures and meso-forms
glycine, the only optically inactive amino
acid
Isomerisation processes
rearranging octane to form iso-octane
cis-2-butenoic acid and trans-2-butenoic
acid
durene isomers and synthetic petrol
citrate to isocitrate - an enzyme at work
A gaggle of isomers
alpha-myrcene and beta-myrcene