| 摘要 |
A CLASS OF METALLOCENES OF FORMULA ( I ):( ZR1M ) N ( CP ) ( A ) R MLPL'' Q ( I ) WHEREIN ( ZR1M )N IS A DIVALENT GROUP BRIDGING CP AND A, CP IS A HETEROCYCLIC CYCLOPENTADIENYL GROUP OF FORMULA ( II ) OR ( II'' ):FORMULA ( II ) FORMULA ( II )WHEREIN ONE OF X OR Y IS A SINGLE BOND, THE OTHER BEING AN HETEROATOM; R2 AND R3 ARE HYDROGEN, HALOGEN OR A HYDROCARBON RADICAL, OPTIONALLY CONTAINING HETEROATOMS; R4 IS HALOGEN OR AN HYDROGEN OR AN HYDROCARBON RADICAL, OPTIONALLY CONTAINING HETEROATOMS; THE GROUP A IS A CYCLOPENTADIENYL DERIVATIVE OR IS EQUAL TO CP; M IS TI, ZR OR HF; M IS 1 OR 2; N RANGES FROM 0 TO 4; R IS 0 OR 1; P AND Q RANGE FROM 0 TO 3; AND A RANGES FROM 0 TO 4. MOREOVER ARE DISCLOSED CATALYST SYSTEM CONTAINING THESE METALLOCENES, USEFUL IN THE POLYMERIZATION OF OLEFINS.
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