| abstract |
The invention relates to a catalyst system for the selective trimerisation o f olefins, which system is based on a titanium complex of formula (Cp-B (R) nA r) TiR13, 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 group s R and B are joined together to from a ring, N is an integer equal to the (valency of B minus 2), and R1 is a mono-anionic group, and further comprise s an activator. The present catalyst system obviates the use of toxic chromium compounds. |