An Improved Method for the Preparation of Tetra-Coordinate Platinum(II) Chloro-Complexes Containing Bidentate or Terdentate Ligands Starting from cis/trans-[PtCl2(SMe2)2]

Abstract

An improved method for the preparation of differently charged chelate Pt(II) chloro-complexes is reported. All the complexes have been obtained rapidly and in high yield, by simply reacting equimolar amounts of cis/transdichlorobis(dimethylsulphide)platinum(II) with the chelate ligand in an appropriate solvent (CH 2 Cl 2 , MeOH or H 2 O). The ligands chosen were: 1,2-bis(diphenylphosphino)ethane (PAP), pyridine-2-carboxylate (NAO ) ), 2-[(methylthio)methyl]pyridine (NAS), 1,10-phenanthroline (NAN), bis(2-pyridylmethyl)sulphide (NASAN), di-(2-picolyl)amine (NANAN), pyridine-2,6-dicarboxylate (OANAO 2) ) and 2,6-bis(methylthiomethyl)pyridine (SANAS).

Probing the Structural Origins of Vapochromism of a Triarylboron-Functionalized Platinum(II) Acetylide by Optical and Multinuclear Solid-State NMR Spectroscopy

“…11 Calculations were performed at the B3LYP level of theory using LANL2DZ as the basis set for Pt and 6-31G* for all other atoms. 12 Syntheses of p-(dimesitylboryl)phenylacetylene, 13 Pt(dbbpy)Cl 2 (dbbpy = 4,4 0 -di-tert-butyl-2,2 0 -bipyridine), 14 Pt(dppp)Cl 2 (dppp = 1,3-diphenylphosphinopropane), 15 and Pt(dbbpy)(CtCC 6 H 5 ) 2…”

New platinum(II) and palladium(II) quinoline-imine-pyridine, quinoline-imine-thiazole and quinoline-imine-imidazole complexes by metal-assisted condensation reactions

“…The ability of the transition metal precursor to coordinate the 8-aminoquinoline and the other N-heterocycle is, instead, of primary importance. The metal-assisted condensation does not happen, for example, using PtCl 2 (COD), which is less reactive than cis/trans-PtCl 2 (SMe) 2 [23]. Moreover, in our previous studies we have observed in some cases that the metal-assisted condensation happens only by removing a coordinated chloroligand from the transition metal precursor using a silver salt [10].…”

“…Chloro-complexes of Pt(II) and Pd(II) containing a pyridine ring in the tridentate ligand have been already prepared on the basis of the same synthetic approach [10]. Preliminary studies have shown that the complex PtCl 2 (COD) is not a suitable precursor for the metal-assisted condensations considered in this work, having a lower reactivity as compared to cis/trans-PtCl 2 (SMe 2 ) 2 [23]. The formation of tridentate cationic complexes has been confirmed by their elemental analyses (C, H, N, Cl), the conductivity of their solutions in polar solvents and their NMR spectra.…”