| http://www.w3.org/ns/prov#value | - The organic halide which forms the remaining component of the catalyst system can be defined by the formula, RgCX, wherein R can be an aromatic radical such as phenyl, tolyl, etc.; or an alkyl radical having from one to 10 carbon atoms, preferably from one to four carbon atoms, such as methyl, ethyl, propyl, isopropyl, isobutyl, normal butyl, etc.; and X is a halogen atom selected from the group c
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