Cobalt chloride complexes of N-3 and N-4 donor ligands
Kooistra TM, Hekking KFW, Knijnenburg Q, de Bruin B, Budzelaar PHM, de Gelder R, Smits JMM, Gal AW
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY (4): 648-655 FEB 2003

Abstract:
A number of cobalt(ii) chloride complexes of pyridine/amine N-3 and N-4 donors have been prepared and structurally characterised. Even though they are paramagnetic, assignment of the H-1 NMR signals was possible in several cases. With the exception of tpa, which formed a cationic monochloride complex, all new complexes have cis-coordinated chlorides. Nevertheless, only the relatively rigid pyp ligands gave rise to (low) ethene polymerisation activity on activation with MAO.