Preparation of Vicinal Difunctional Compounds by the Converted Electrophilic Halogenation of Multiple Bonds

The halogenation of unsaturated compounds in various reactive solvents (water, mineral acids, lower aliphatic alcohols and acids, etc.), involving the addition of halogen and a solvent fragment at the multiple bond, is discussed. The reasons for the varying orientation in the addition of unlike species at the multiple bond, as a function of the structure of the unsaturated compound, the type of electrophilic halogen, and the nucleophile, are considered in terms of the theory of halogenonium ions. The list of references contains 132 items.