Neutral palladium(II) complexes with P,N Schiff-base ligands: Synthesis, characterization and catalytic oligomerisation of ethylene
作者:Mokgolela M. Mogorosi、Tebello Mahamo、John R. Moss、Selwyn F. Mapolie、J. Chris Slootweg、Koop Lammertsma、Gregory S. Smith
DOI:10.1016/j.jorganchem.2011.07.042
日期:2011.11
New N-functionalised 2-phosphinobenzaldimino (P boolean AND N) ligands bearing 3-picolyl, furfuryl, thiophene-2-methyl, thiophene-2-ethyl, and benzyl groups have been prepared in good yield. The 2-phosphinobenzaldimino ligands were reacted with PdCl2(COD) to give the corresponding metal complexes of the type Pd(L)Cl-2 (L = 2-phosphinobenzaldimino (P boolean AND N) ligand). All compounds were fully characterized using spectroscopic and analytical techniques, including H-1, C-13, and P-31 NMR and IR spectroscopies, mass spectrometry and elemental analysis. Selected neutral palladium complexes were evaluated as catalyst precursors in ethylene oligomerisation reactions, after activation with a co-catalyst (MMAO, EtAlCl2, or Et2AlCl). (C) 2011 Elsevier B.V. All rights reserved.