328067-66-9Relevant academic research and scientific papers
Tripodal bis(2,6-iminophosphoranyl)pyridine ligands: Iron and cobalt complexes with a potential in ethene polymerisation
Kreischer, Kerstin,Kipke, Jennifer,Bauerfeind, Matthias,Sundermeyer, Joerg
, p. 1023 - 1028 (2001)
By Staudinger Reaction of bis-2,6-diphenylphosphanyl-pyridine with aryl-, alkyl- and silylazides tripodal ligands L = 2,6-(Ph2P=NR)2C5H3N (R = Ph 1a, Mes 1b, Ad 1c, SiMe3 1d) are synthesized. The reaction of ligand 1b with equimolar amounts of [CoCl2(THF)2] and [FeCl2(THF)1.5] in THF does not lead to the expected neutral complexes [(κ3-L)MCl2] but to coordination compounds of the composition L2(CoCl2)3 (2a) und L(FeCl2)2 (3). By using acetonitrile as solvent or by crystallisation of 2a from hot acetonitrile the cationic complex [(κ3-L)CoCl(MeCN)]Cl (2b) is formed as a second product. The molecular structure 2b has been characterized by an X-ray single crystal structure analysis (triclinic, P1, Z = 2, a = 1299.8(1), b = 1488.8(2), c = 1674.2(2) pm, α = 82.911(13)°, β = 76.715(12)°, γ = 72.758(11)°). A preliminary test with 3 shows, that coordination compounds of the ligand system introduced here have potential as catalysts in methyl alumoxane mediated ethene polymerisation. Wiley-VCH Verlag GmbH, 2001.
