• halogen
  • In oxychlorination, the combination of hydrogen chloride and oxygen serves as the equivalent of chlorine, as illustrated by this route to dichloroethane: 2 HCl + CH2=CH2 + ​1⁄2 O2 → ClCH2CH2Cl + H2O The facility of halogenation is influenced by the halogen. (wikipedia.org)
  • The initial stage of the halogenation of aromatic compounds differs from that of the halogenation of alkenes in that alkenes do not require a catalyst to enhance the electrophilicity of the halogen. (wikipedia.org)
  • ketones
  • Gold-catalysed halogenation was further combined with gold-catalysed hydration and subsequent annulation to provide convenient routes to iodomethyl ketones and five-membered aromatic heterocycles. (ucl.ac.uk)
  • stage
  • DNA halogenation as potential biomarkers during the early inflammation stage and its regulation by food constituents. (nii.ac.jp)