| 摘要 |
In the di- or trimerisation of 1,3-diolefines, esp. butadiene to cyclic cpds. at normal or raised press. and raised temp. in the presence of a catalyst, cpds. with C=C bonds are used as electron donors, e.g. ethylene and cycloctadiene. The catalyst are carbon monoxide free-cpds. of Ni or Co, e.g. Ni acetyl acetonate, with organometallic cpds., e.g. briguans reagents and metal hydride complexes. Solvent for reaction is aliphatic aromatic or halogenated hydrocarbon. Metal organic cmpds. or metal hydrides are from groups (I) to (III). Task of electron donors is to hold the reaction products in true or colloidal soln. Pressure 1 to 20 atm., temp. 20-150 deg.C. |
