GB954440A - Trihalovinylsulphenylhalides and their preparation - Google Patents

Abstract

The invention comprises the compounds of the formula CX2:CX.SX, where each X is chlorine or bromine; the production of such compounds wherein -SX is -SCl by chlorinating the corresponding trihalovinyl di- or polysulphide; the production of trichlorovinyl sulphenyl chloride and bromide by dehydrohalogenating the corresponding tetrachloroethyl compound, e.g. with triethylamine at room temperature; and the production of N-trichlorovinyl mercaptophthalimide and -tetrahydrophthalimide by reacting CCl2:CCl.SCl with phthalimide or tetrahydrophthalimide in the presence of an acid-binding agent. In addition sulphenyl chlorides of the invention may be converted to the corresponding sulphenyl bromides by means of hydrogen bromide. The compounds of the invention are said to react with oxygen, nitric acid or hydrogen peroxide to form the corresponding sulphinic and sulphonic derivatives, with chlorine and bromine to form pentahaloethyl sulphenyl halides, with nucleophilic anions, with nitrogen bases, with reducing agents such as HI to give the corresponding disulphide, with aromatic compounds to give trihalovinyl aryl sulphides, with olefines to give 2-haloalkyl sulphides, with acetylenes to give 2-halovinyl sulphides, with H2S to give the corresponding tri- and polysulphides, with organic phosphites to give S-trihalovinyl phosphorothiolates, and with carbanions to give trihalovinyl alkyl sulphides. The compounds of the invention can be used to control soil pathogens (see Division A5). Specifications 949,374 and 949,375 are referred to.ALSO:Pathogens in soil are controlled by applying to the soil a compound of formula CX2 : CX.SX, where each X is Cl or Br (see Division C2). Similarly used is N-trichlorovinylmercaptophthalimide. Specifications 949,374 and 949,375 are referred to.