| Autor: |
Getty, A. D., Goldberg, K. I. |
| Zdroj: |
Organometallics; June 2001, Vol. 20 Issue: 12 p2545-2551, 7p |
| Abstrakt: |
The potentially tridenate ligand o,o-Ph2PC6H4C&dbd;NCH2C6H4Br (PNC-Br, 1), prepared by a Schiff base condensation of 2-(diphenylphosphino)benzaldehyde and 2-bromobenzylamine, reacts with Pd2(dba)3 (dba = dibenzylideneacetone) to form the (PNC)PdBr complex (2). Abstraction of the bromide ligand from 2 with AgBF4 in acetone-d6 results in formation of the acetone adduct [(PNC)Pd(OC(CD3)2)][BF4] (3). Reaction of 3 with water lead to formation of the Pd(II) dimer [(PN)Pd(μ-OH)]2[BF4]2 (4). That formation of dimer 4 occurs by protonation of the metal-bound aryl group of the PNC ligand by water was verified by a deuterium-labeling experiment. This is a rare example of protonation of a hydrocarbyl group from a d8 square planar metal by water. 4 has been characterized by NMR, elemental analysis, and X-ray crystallography. Reaction of 4 with 2−10 equiv of aniline or p-toluidine results in the formation of the mixed dimer syn-[((PN)Pd)2(μ-NHAr)(μ-OH)][BF4]2 (5). |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
