Palladium(II) complexes containing P∼N∼O donors. Ligand effect of tridentate versus bidentate coordination on the oligomerization of ethylene
Journal
Organometallics
Journal Volume
21
Journal Issue
15
Pages
3203-3207
Date Issued
2002
Author(s)
Abstract
Palladium complexes containing the [(RO)nC6H5-nC=]N(C6H4PPh 2-o) (P∼N∼O) ligand were synthesized, and the hemilability of the coordinating oxygen donors toward the metal center was studied. In the case of oxygen being a ether functionality (R = Me), acetonitrile readily replaces the tridentate ether donor in [Pd(P∼N∼O)Me]BF4 (1) to yield [Pd(P∼N∼O)(MeCN)-Me]BF4 (2). The labile nature of the ether donor assists the complex 1 in catalyzing the oligomerization of ethylene. Presumably, the temporary coordination of the ether donor to the vacant site during migratory insertion suppresses the β-elimination, which allows the elongation of the alkyl chain.
Type
journal article