{TAIL ~ The catalyst compound} 1, wherein {HEAD ~ L} is selected from the group consisting of a phosphine, an N heterocyclic carbene, and a cyclic alkyl amino carbene 
{ TAIL ~ The catalyst compound } 1 , wherein { HEAD ~ L } is selected from the group consisting of a phosphine , an N heterocyclic carbene , and a cyclic alkyl amino carbene
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH