| http://www.w3.org/ns/prov#value | - l or substituted-hydrocarbyl radical, halocarbyl radical or substituted organometalloid radicals, which radical may optionally be covalently bonded to both M and L'; and B' is a chemically stable, non-nucleophilic substituted anionic complex having a molecular diameter about or greater than 4 angstroms; and d is an integer representing the charge of B'. 2.
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