| 摘要 |
The invention relates to a catalyst system for the selective trimerization of olefins, which system is based on a titanium complex of formula (Cp-B(R)<SUB>n</SUB>Ar)TiR<SUP>1</SUP><SUB>3</SUB>, wherein: Cp is a cyclopentadienyl type ligand, optionally substituted, B is a bridging group, based on a single atom selected from the groups 13 to 16 inclusive of the Periodic System, Ar is a aromatic group, optionally substituted, R is, independently, hydrogen, or a hydrocarbon residue, optionally being substituted and optionally containing heteroatoms, or groups R and B are joined together to form a ring, n is an integer equal to the (valency of B minus 2), and R<SUP>1 </SUP>is a mono-anionic group, and further comprises an activator. The present catalyst system obviates the use of toxic chromium compounds. |
