Cationic 2,6-bis(imino)pyridine iron and cobalt complexes: synthesis, structures, ethylene polymerisation and ethylene/polar monomer co-polymerisation studies - Britovsek,GJP; Gibson,VC; Spitzmesser,SK; Tellmann,KP; White,AJP; Williams,DJ (JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 2002)