Chirality

do they have the same formula? No

Different compounds

same formula, atoms connected differently?

constitutional isomers

same formula, atoms connected the same way, but arranged differently

stereoisomers

same formula, same connectivity, and you can rotate a side to make it the same

conformational isomer

same formula, same connectivity, but you can’t rotate a side to make it the same

configurational isomers

same formula, same connectivity, you can’t rotate a side to make it the same, and caused by limited rotation

cis/trans geometric

same formula, same connectivity, you can’t rotate a side to make it the same, and aren’t caused by limited rotation

optical steroisomers

mirror images (RR, SS) (SR, RS)

enatiomer

non mirror images (RR, SR) (RR, RS) (RS, SS) (SS, SR)

diastereomers

regiospecific

makes constitutional isomers
think markovnikov

stereospecificity

makes stereoisomers
3D formation of bonds