878660-80-1Relevant academic research and scientific papers
Synthesis and structures of ferrocenyl-substituted salicylaldiminato complexes of magnesium, titanium and zirconium
Bott, Robyn K.J.,Schormann, Mark,Hughes, David L.,Lancaster, Simon J.,Bochmann, Manfred
, p. 387 - 396 (2006)
N-ferrocenyl salicylaldimine (FcPI)H, readily accessible from aminoferrocene and salicylaldehyde, reacts with dibutylmagnesium in THF to afford a red crystalline (FcPI)2Mg(THF)2 (2). The reactions of the Li(FcPI) with CpTiCl3 gave CpTiCl2(FcPI) · CH2Cl2 (4), whereas with CpZrCl3 · DME a mixture of three products is formed: CpZrCl(FcPI)2 (5), CpZrCl2(FcPI) (6), and (FcPI)2ZrCl2 · CH2Cl2 (3 · CH2Cl2). The crystal structures of compounds 2-6 are reported. Typically, the N-O chelates are oriented such that O donors are mutually trans, while N donors prefer to be trans to Cl ligands. The redox potentials of these complexes are very similar to ferrocene. On activation with methylaluminoxane, the Ti complex 4 shows moderate activity for ethylene polymerisation, while (FcPI) 2ZrCl2 is highly active for the oligomerisation of ethylene, to give products with average degrees of polymerisation of 12-16.
