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