| http://www.w3.org/ns/prov#value | - Non-hydrogen substituents R include the atoms carbon, silicon, boron, aluminum, nitrogen, phosphorous, oxygen, tin, sulfur, germanium and the like, including olefins such as but not limited to olefinically unsaturated substituents including vinyl-terminated ligands, for example but-3-cnyl, prop-2-cnyl, hex-5-cnyl and the like.
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