| http://www.w3.org/ns/prov#value | - The product or article of claim 15 wherein each R is hydrogen or an alkyl or aromatic group having from 1 to about 10 carbon atoms, each R' is a divalent hydrocarbyl group having from 1 to about 10 carbon atoms; each R is independently hydrogen or a hydrocarbyl group having from 1 to about 10 carbon atoms; and Z is a halide, fluoborate, phosphate, or carboxylate.carboxylic acid complex.
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