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- Title
Triphenylphosphinopalladium(II) complexes with ONO-donor ligands: syntheses, structures and catalytic applications in CC.
- Authors
Prabhu, Rupesh Narayana; Babu, G. Narendra; Pal, Samudranil
- Abstract
Reactions of 1-((2-hydroxy-5-R-phenylimino)methyl)naphthalen-2-ols (H2L n, n = 1-3 for R = H, Me, Cl, respectively) with [Pd(PPh3)2Cl2] and Et3N in toluene under reflux produced three new mononuclear square-planar palladium(II) complexes with the general formula [Pd(L n)(PPh3)] ( 1, R = H; 2, R = Me; 3, R = Cl). All the complexes were characterized using elemental analysis, solution conductivity and various spectroscopic (infrared, UV-visible and NMR) measurements. Molecular structures of 1, 2, 3 were confirmed using single-crystal X-ray diffraction analysis. In each complex, the fused 5,6-membered chelate rings forming phenolate-O, azomethine-N and naphtholate-O donor (L n)2− and the PPh3 form a square-planar ONOP coordination environment around the metal centre. Infrared and NMR spectroscopic features of 1, 2, 3 are consistent with their molecular structures. Electronic spectra of the three complexes display several strong primarily ligand-centred absorption bands in the range 322-476 nm. All the complexes were found to be effective catalysts for carbon-carbon of arylboronic acids with aromatic and heteroaromatic aldehydes to form the corresponding diaryl ketones. Copyright © 2016 John Wiley & Sons, Ltd.
- Subjects
PALLADIUM compounds; METAL complexes; LIGANDS (Chemistry); COMPLEX compounds synthesis; CRYSTAL structure; CARBON-carbon bonds; CATALYSIS
- Publication
Applied Organometallic Chemistry, 2017, Vol 31, Issue 1, pn/a
- ISSN
0268-2605
- Publication type
Article
- DOI
10.1002/aoc.3544