Bp Chemicals Limited

Simon Michael Green

Peter James Maddox

A complex of transition metal Ti, Fe, Co, Ni, Cr, Mn, Ta, Rh, Y, Sc, Ru, Pd, Zr, Hf, V or Nb and a mono-, bi-, tri-, or tetra-dentate ligand, wherein at least one of the donor atoms of the ligand is a nitrogen atom N with a 5-membered heterocyclic substituent joined to the N by a carbon atom. The complex is preferably Formula (I) wherein R&#x2014;N-G-Xis a bi-, tri, or tetra-dentate ligand, N is joined to G by an imine linkage; G is a bridging group which can contain a third or fourth donor atom; Xis &#x2014;O or &#x2014;S if the X-M bond is covalent, or if the X-M bond is dative Xis &#x2550;S, &#x2014;PRR, &#x2014;PRR, &#x2550;NR, &#x2550;NR, &#x2014;NRRor &#x2014;NRR; Rand Rare 5-membered heterocyclic substituents joined to the nitrogen (or phosphorus) atoms via a carbon atom: Rand Rare hydrocarbyl or heterohydrocarbyl, substituted hydrocarbyl or aryl substituent; X represents an atom or group covalently or ionically bonded to the transition metal M: L is a group datively bound to M, and n is from 0 to 5; q is 1 or 2. The complexes find use as polymerisation catalysts, preferably with an activator, e.g. MAO 

Polymerisation catalyst

A complex of transition metal Ti, Fe, Co, Ni, Cr, Mn, Ta, Rh, Y, Sc, Ru, Pd, Zr, Hf, V or Nb and a mono-, bi-, tri-, or tetra-dentate ligand, wherein at least one of the donor atoms of the ligand is a nitrogen atom N with a 5-membered heterocyclic substituent joined to the N by a carbon atom. The complex is preferably formula (I) wherein R&#x2014;N-G-Xis a bi-, tri, or tetra-dentate ligand, N is joined to G by an imine linkage; G is a bridging group which can contain a third or fourth donor atom; Xis &#x2014;O or &#x2014;S if the X-M bond is covalent, or if the X-M bond is dative Xis &#x2550;S, &#x2014;PRR, &#x2014;PRR, &#x2550;NR, &#x2550;NR, &#x2014;NRRor &#x2014;NRR; Rand Rare 5-membered heterocyclic substituents joined to the nitrogen (or phosphorus) atoms via a carbon atom: Rand Rare hydrocarbyl or heterohydrocarbyl, substituted hydrocarbyl or aryl substituent; X represents an atom or group covalently or ionically bonded to the transition metal M; L is a group datively bound to M, and n is from 0 to 5; q is 1 or 2. The complexes find use as polymerization catalysis, preferably with an activator, e.g. MAO 

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Egham, United Kingdom

Simon Michael Green