Mercuty mercaptide nitrites and their reaction with the alkyl iodides chain compounds of sulphur and reaction of potassium salts of 2-thio 1-5-thio 4-phenyl 1-4:5-Di-hydro 1:3, 4-thiodiazole and 2:5 dithiol-1:3:4 thiodiazole with halogenated organic com