C2H5OH → C2H4 → СH2OH-CH2OH → CH2Br-CH2Br
C2H5OH → C2H4+H2O
3C2H4 + 2KMnO4 +4 H2O → 3СH2OH-CH2OH+ 2MnO2 + 2KOH
СH2OH-CH2OH+2HBr → CH2Br-CH2Br+ 2 H2O
CH2Br-CH2Br+ 2 H2O → СH2OH-CH2OH+2HBr
C2H5OH → C2H4 → СH2OH-CH2OH → CH2Br-CH2Br
C2H5OH → C2H4+H2O
3C2H4 + 2KMnO4 +4 H2O → 3СH2OH-CH2OH+ 2MnO2 + 2KOH
СH2OH-CH2OH+2HBr → CH2Br-CH2Br+ 2 H2O
CH2Br-CH2Br+ 2 H2O → СH2OH-CH2OH+2HBr