| http://www.w3.org/ns/prov#value | - hydrogen, halogens, and organoradicals; k is a number sufficient to fill out the remaining valances of Me; with the further proviso that at least one of said Z's or R has at least one internal alkynyl substituent, (b) prepolymerizing ethylene in the resulting liquid, in the presence of silica, and (c) separating the resulting solid from the liquid. 23.
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