The catalysts comprise a metalatable particle, such as a bound rubber, a thermoplastic polymer or {HEAD ~ a cured elastomer}, that is multiply metalated with {TAIL ~ Group IA alkali metal atoms} 
is multiply metalated with
The catalysts comprise a metalatable particle , such as a bound rubber , a thermoplastic polymer or { HEAD ~ a cured elastomer } , that is multiply metalated with { TAIL ~ Group IA alkali metal atoms }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL