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Abstract SINCE THIS THESIS DESCRIBES THE NUCLEOPHILIC ADDITIONS OF ORGANIC SULPHUR COMOUNDS TO ACETYLENIC ESTERS AND KETONES, THE FOLLOWING SECTION INCLUDES THE PERINENT LITERATURE ON SUCH ADDITION REACTIONS TO ACETYLENES. IT WAS, HOWEVER,FOUND CONVENIENT TO INCLUDE, WHENEVER NECESSARY, ADDITIONS OF THE SAME NUCLEOPHILES TO ETHYLENIC-DOUBLE BOND CONTAINING-COMPOUNDS. THE INTERACTION OF THIOLS WITH UNSATURATED HYDROCARBONS WAS FIRST REPORTED BY POSNER(1)WHO TREATED THIOPHENOL AND BENZYL-THIOL WITH A VARIETY OF OLEFINS AT ROOM TAMPERATURE IN THE PRESENCE OF ACETIC AND SULPHURIC ACIDS. WITH SIMPLE OLEFINS, CONJUGATED AND NON-CONJUGATED, ADDITION OF FRAGMENTS OF THE THIOL PRODUCED BY SCISSION OF THE S-H BOND PROCEEDED READILY AND, AT AN UNSYMMETRICALLY SUBSTITUTED DOUBLE BONDS, |