Chromium imine and amine complexes as homogeneous catalysts for the trimerisation and polymerisation of ethylene

Chromium(III)-based tridentate imine and amine complexes 1 and 2 are active catalysts together with the cocatalyst MAO for the trimerisation and polymerisation of ethylene. The influence of different donor atoms and substituents in the ligands I and II is tested on the catalytic activity and selectivity.