| abstract |
A catalyst for the polymerisation is disclosed comprising (1) a catalyst comprising a compound of Formula (I) wherein M is Fe[II], Fe[III], Co[I], Co[II], Co[III], Mn[I], Mn[II], Mn[III], Mn[IV], Ru[II], Ru[III] or Ru[IV]; X represents an atom or group covalently or ionically bonded to the transition metal M; T is the oxidation state of the transition metal M and b is the valency of the atom or group X; R?1 to R5 and R23 to R28¿ are independently selected from hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, heterohydrocarbyl or substituted heterohydrocarbyl; R19 is an optionally substituted primary, secondary or tertiary hydrocarbyl or heterohydrocarbyl group; when R19 is an optionally substituted primary hydrocarbyl or heterohydrocarbyl group, one of R?20 to R22¿ is hydrogen and the others are each independently hydrogen, halogen or an optionally substituted primary hydrocarbyl or heterohydrocarbyl group; when R19 is an optionally substituted secondary hydrocarbyl or heterohydrocarbyl group, two of R?20 to R22¿ are hydrogen and the other is hydrogen, halogen or an optionally substituted primary or secondary hydrocarbyl or heterohydrocarbyl group; when R19 is an optionally substituted tertiary hydrocarbyl or heterohydrocarbyl group, R?20 to R22¿ are all hydrogen; and any two or more of R?19 to R28¿ can be linked to form one or more cyclic substituents; and (2) a further catalyst for the polymerisation of 1-olefins which is different from catalyst (1). |