Note: Stereospecific reaction with anti addition based on bromonium ion intermediate

Note: Stereospecific reaction, but both enantiomer products possible since the initial addition could have occured against either face of the π bond

Note: Stereospecific reaction with anti addition based on bromonium ion intermediate

Note: Addition to the other face of the π bond could yield an enantiomer except, in this case, the result is a meso compound

Note: Alkoxy groups are such strong activators that multiple bromination will occur, even without a Lewis acid catalyst!

Note: Naphthalene is more reactive to EAS reactions than benzene which can result in halide substitutions even in the absence of any Lewis acid catalyst.

Note: Br₂ adds to alkyne π bonds similar to alkene addition with respective anti-addition stereospecificity