“…It is known that the electrophilic addition of sulfenyl chlorides [ 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 ] to linear 1-alkene leads predominantly to anti-Markovnikov products [ 43 , 44 , 45 , 46 ] and thiiranium cations are regarded as intermediates in these reactions [ 43 , 44 , 45 , 46 , 47 , 48 ]. In the cases of 4-pentenoic and 5-hexenoic acids, allylchloride, allylbromide and allyl cyanate, there are no heteroatoms (adjacent to the double bond) which could stabilize the intermediates, and the reactions take place via thiiranium intermediate A .…”