| http://www.w3.org/ns/prov#value | - ectly attached to a single carbon atom and is also attached through a double bond to an oxygen or nitrogen atom, at elevated temperatures andpressures in the presence of a metallic selenium or selenium compound catalyst and a base and/or water, is subjected to a treatment with copper (I) chloride, an amine or nitrile complexing solvent and oxygen or an oxygen-containing gas such as air, toform com
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