A catalyst precursor 1 wherein {HEAD ~ the stabilizing agent} is selected from {TAIL ~ the group} consisting of acetonitrile and tetrahydrofuran 
is selected from
A catalyst precursor 1 wherein { HEAD ~ the stabilizing agent } is selected from { TAIL ~ the group } consisting of acetonitrile and tetrahydrofuran
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH