Production of vinylidene-terminated and sulfide-terminated telechelic polyolefins via quenching with disulfides

A method for preparing a compound of formula II or III or mixtures thereof:

• wherein R1 is a polyolefin group;
• RA and RB are each, independently, alkyl, aryl, aralkyl, alkaryl,
• wherein m is 1-3;
• n is 1-3;
• p is 1-3;
• X is halo or a pseudohalide;
• Rx is alkyl or aryl;
• R3 is tert-butyl;
• and
• R4 and R5 are each, independently, alkyl, aryl, aralkyl, or alkaryl;
• comprising:
• (a) ionizing a polyolefin in the presence of a Lewis acid or mixture of Lewis acids to form an ionized polyolefin;
• (b) reacting the ionized polyolefin from step (a) with one or more compounds of formula IV:
• RA—S—S—RB IV
• to form an intermediate;
• and
• (c) reacting the intermediate of step (b) with one or more alcohols, amines, or thiols.