Method for producing fluorinated organic compound

A method for producing a halogen adduct of a compound represented by formula (1):

• wherein R1 and R2 are each independently a hydrogen atom, a halogen atom, or an organic group, or R1 and R2 optionally form a ring together with the two adjacent carbon atoms;
• n is 1 or 2;
• and
• the symbol is a double bond or a triple bond, with the proviso that when the symbol is a triple bond, n is 1, when the symbol is a double bond, n is 2, two R1s are optionally the same or different, two R2s are optionally the same or different, or two R1s or two R2s optionally form a ring together with their adjacent carbon atom,
• the method comprising reacting the compound represented by formula (1) with (A) at least one fluorine source selected from the group consisting of hydrogen fluoride, hydrogen fluoride salts, and fluoride salts, and (B) a halogen source other than fluorine represented by the formula:
• R3(OX)m, wherein R3 is an alkali metal, an alkaline earth metal, a cycloalkyl group optionally having one or more substituents, an aryl group optionally having one or more substituents, a non-aromatic heterocyclic group optionally having one or more substituents, or a heteroaryl group optionally having one or more substituents, X is halogen atom other than a fluorine atom, and m is an integer corresponding to the valence of R3, to add fluorine and a halogen other than fluorine to the double bond or triple bond.