{HEAD ~ A further order} of {TAIL ~ addition} is such that the electron donor is initially contacted with the transition metal component for up to 40 seconds 
of
{ HEAD ~ A further order } of { TAIL ~ addition } is such that the electron donor is initially contacted with the transition metal component for up to 40 seconds
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH