| 摘要 |
1,3- or 1,5-cyclooctadienes are isomerized to a mixture containing a major proportion of the 1,4-isomer by reacting the cyclooctadiene with palladium chloride in an alcohol or a carboxylic acid with 1-4 carbon atoms. The complex thus formed is decomposed with a strong field ligand (as defined), e.g. an alkali metal cyanide or with methanolic alkali to yield the 1,4-cyclooctadiene isomer.ALSO:Aliphatic dienes and bicyclic dienes and olefins undergo emulsion polymerization in the presence of a cyclooctadiene palladium chloride complex (for preparation see Division C2). The polymerization is performed at a temperature between 0 DEG and 100 DEG C.; the emulsifier preferably being anionic, e.g. an alkali metal salt of an alkyl sulphate or alkyl aryl sulphonate, a typical formulation being: complex 0.01-0.5 parts; monomer 10-60 parts; emulsifier 2.5-10 parts and water 100 parts, all parts being by weight. The examples specify polymerization of norbornene, norbornadiene and butadiene.ALSO:A complex reaction product of 1,3 and 1,4 cyclooctadiene and palladium chloride is obtained by mixing the palladium chloride (one mole) with the cyclooctadiene (1 to 100 moles) in a solvent in which the reactants are soluble but the product is not, at a temperature between 0 and 100 DEG C. Suitable solvents are alcohols or carboxylic acids with 1 to 4 carbon atoms. |
