| abstract |
Characterized by a halogenated catalyst containing an oxidized transition metal complex (a) represented by the following general formula (1), or a halogenated catalyst formed from the oxidized transition metal complex (a) and oxygen (b): To do. Thus, a highly active catalyst for efficiently proceeding with halogenation under mild conditions can be provided, and a catalyst that can be easily recovered after the reaction and recycled to the reaction is provided. A x MO (2 + 0.5x) (1) (In the formula, A represents an alkali metal, M represents at least one transition metal element selected from the group consisting of chromium, manganese, cobalt, nickel and iron, and x represents a number of 0 <x ≦ 3. .) |