The process comprises adding an olefin to a titanium halide and then adding an electron donor to {HEAD ~ the mixture} of {TAIL ~ the olefin} and titanium halide 
of
The process comprises adding an olefin to a titanium halide and then adding an electron donor to { HEAD ~ the mixture } of { TAIL ~ the olefin } and titanium halide
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH