Alkene Electrophilic Addtion

Atoms Added	Name	Reagents	Regiochemistry	Stereochemistry	Subsequent Reactions
B, H	Hydroboration	diborane	anti-Markovnikov	syn	Oxidation (H₂O₂, NaOH) Net anti-Markovnikov Addition of Water
H, H	Hydrogenation	hydrogen, transition metal	n/a	syn	n/a
C:	Carbene Addition	diazomethane, chloroform, CH₂I₂/Zn	n/a	syn	n/a
C C	Cycloadditions
H, O	Hydration, Ether Synthesis	acid, water or alcohols	Markovnikov	anti?	n/a
Hg, O	Oxymercuration	Hg²⁺, water or alcohols	Markovnikov?	anti	Reduction (NaBH₄) Net Markovnikov Addition of Water
H, X	Hydrohalogenation	mineral acid	Markovnikov	anti?	n/a
Br^., H^.	Bromine Radical Addition	hydrogen bromide, peroxide	anti-Markovnikov	n/a	n/a
O	Epoxidation	peracid	n/a	syn	Ring Opening with H₃O⁺ Gives Anti Vicinal Diols
O, O	Dihydroxylation	osmium tetraoxide, potassium permanganate (Baeyer Test)	n/a	syn	H₂S Releases Syn Vicinal Diols, H₂O₂ regenerates the OsO₄
O₃	Ozonolysis	ozone	n/a	syn	Ring Opening, Addition, Reduction (Zn)
X, O	Halohydrin or Haloether Synthesis	halogen, water	Markovnikov?	anti	Epoxidation (NaOH)
X, X	Halogenation	halogen	n/a	anti	n/a