A catalyst precursor is provided that is useful in the selective hydrogenation of {HEAD ~ olefinic unsaturation} in polymers or {TAIL ~ copolymers} 
in
A catalyst precursor is provided that is useful in the selective hydrogenation of { HEAD ~ olefinic unsaturation } in polymers or { TAIL ~ copolymers }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH TAIL TAIL TAIL TAIL TAIL