Palladium and platinum complexes of the new ligands containing P–N and P–O bonds

A number of applications have been found for the variety complexes of Pd(II) and Pt(II) due to their marked catalytic activities. This study is intended to examine the seven and eight-membered novel complexes which have been prepared by P–N–C–C–O–P and P–N–C–C–C–O–P backbone ligands. The air-stable complexes [M = Pd (1a, 3a), Pt (1b, 3b)] containing aminophosphine-phosphinite metallocyclic rings were obtained with high yields. All the compounds were characterized by 31P{1H}, 13C{1H} and 1H NMR spectroscopy, FTIR spectroscopy and elemental analysis. Furthermore, the structure of complexes (1a and 3a) were determined by X-ray crystallography. The novel complexes (1a and 3a) are very effective catalysts on Suzuki–Miyaura cross-coupling reactions of various aryl chlorides and aryl bromides with phenylboronic acid.

Graphical abstractThe novel heterocyclic palladium and platinum complexes with new aminophosphinephosphinite type ligands and palladium and platinum complexes were synthesized in good yields and fully characterized with spectroscopic methods and X-ray crystallography. The novel complexes are very effective catalysts on Suzuki–Miyaura cross-coupling reactions of various aryl bromides and aryl chlorides with phenylboronic acid.Figure optionsDownload full-size imageDownload as PowerPoint slide