Platinum Phosphine Complexes Research Articles

Photoelectron spectra and tertiary phosphine–metal complexes

Vertical ionization potentials are shown not to be a reliable guide to the donor abilities of tertiary phosphines nor to the electronic tendencies of tertiary phosphine–platinum complexes to undergo oxidative addition reactions.

Electroanalytical investigation on dichlorobis(tertiary phosphine)platinum(II) complexes

Cis- and trans-dichlorobis(tertiary) phosphine)platinum(II) complexes [PtCl 2(PMe xPh 3-x) 2] (x = 0,1,2,3) and [PtCl 2(PEt 3) 2] have been investigated by cyclic voltammetry and controlled potential electrolysis in acetonitrile solution by using both platinum and mercury electrodes. The results show that the investigated platinum(II) compounds can be either oxidized or reduced to phosphine complexes of platinum(IV) and platinum(0), respectively. The dependence of the oxidation and reduction potential values on the nature of the phosphine ligands is discussed. Furthermore, it has been found that the trans-complexes are more easily oxidized than the cis-analogues and that a slow cis-trans isomerisation occurs in acetonitrile solution.

The preparation, NMR spectra, and structure of unsymmetrical ditertiary phosphine complexes of platinum(II)

The 1 J(PtP) coupling constants in the complexes cis-PtCl 2 (R 2PCH 2 - CH 2 PPh 2), where R = CF 3, C 6 F 5, and the bond lengths in the complex with R = CF 3 indicate that the metalligand bonding is strongly influenced by the substituents on phosphorus.

ChemInform Abstract: USE OF CARBON‐13 NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY FOR DETERMINING THE POSITION OF DEUTERIUM INCORPORATION INTO SIMPLE ALKENES AND INTO TERTIARY PHOSPHINE COMPLEXES OF PLATINUM(II)

Carbon-13 n.m.r. spectroscopy is shown to be a valuable analytical tool—offering considerable advantages over other physical methods—for investigating the site, and in some cases the degree, of deuterium incorporation in several simple alkenes and also in various tertiary phosphine complexes of platinum(II). 13C N.m.r. data are presented for the alkenes, CH2CHC(CH3)2R (R = Et, Pr, and Bu) together with their partially deuteriated analogues and also for the complexes [M2Cl4L2](M = Pd or Pt; and L = PEt3, PPr3, PBu3, or PBut2Pr) together with the partially deuteriated analogues [M = Pt and L = PPr3(D), PBu3(D), or PBut2Pr(D)].

The thermal isomerisation of some four co-ordinate square planar complexes of palladium and platinum with phosphine ligands

Thermally induced cis— trans isomerisation is reported for square planar complexes of the type MX 2L 2, M = Pd or Pt, L = organophosphorus ligand and X = halide. However, the palladium dichloro-phenyldimethyl complex provides another example of the more unusual trans— cis isomerisation. A number of phosphine complexes of platinum have been vacuum-distilled, in some cases with accompanying isomerisation. The tendency for such isomeric behaviour is interpreted in terms of variation in metal to phosphorus bond strength.

Use of carbon-13 nuclear magnetic resonance spectroscopy for determining the position of deuterium incorporation into simple alkenes and into tertiary phosphine complexes of platinum(II)

Carbon-13 n.m.r. spectroscopy is shown to be a valuable analytical tool—offering considerable advantages over other physical methods—for investigating the site, and in some cases the degree, of deuterium incorporation in several simple alkenes and also in various tertiary phosphine complexes of platinum(II). 13C N.m.r. data are presented for the alkenes, CH2CHC(CH3)2R (R = Et, Pr, and Bu) together with their partially deuteriated analogues and also for the complexes [M2Cl4L2](M = Pd or Pt; and L = PEt3, PPr3, PBu3, or PBut2Pr) together with the partially deuteriated analogues [M = Pt and L = PPr3(D), PBu3(D), or PBut2Pr(D)].

Hydrogen–deuterium exchange at a saturated carbon atom in tertiary phosphine complexes of platinum(II)

Chloro-bridged diplatinum(II) complexes of the type [Pt2Cl4L2](L = PPr3, PBu3, PButPr2, PBut2Pr, PPrPh2, PPr2Ph, or PButPh2), undergo a regiospecific hydrogen-deuterium exchange in an aqueous (D2O) acetic acid (CH3CO2D) medium to give complexes containing deuterium in the alkyl groups of the tertiary phosphine moiety and, in the case of L = PButPh2, also in the aryl groups. The steric requirements of the tertiary phosphine have a marked influence on both the rate and the position of deuterium incorporation. The results presented show that, in internal-metallation reactions of platinum, the ease of ring formation decreases in the order five-membered > six-membered > four-membered rings. It is suggested that in such reactions steric rather than electronic factors are dominant.

Some reactions of phosphine complexes of platinum(0) and palladium(0) with acidic solvents; a phosphorus-31 nuclear magnetic resonance study

The complexes [Pt(PPh3)4] and [Pt(PPh3)3] react quantitatively with anhydrous hydrogen chloride and bromide to give cis-dihalogenobis(triphenylphosphine)platinum(II) complexes and hydrogen. [Pd(PPh3)4] In liquid hydrogen chloride reacts to give trans-dichlorobis(triphenylphosphine)palladium(II) and hydrogen but the reaction proceeds with further replacement of triphenylphosphine at the metal, since trans-[PdCl2(PPh3)2] itself reacts in liquid hydrogen chloride to give triphenylphosphonium tetrachlorodi-µ-chloro-dipalladate(II), [Ph3PH]2[Pd2Cl6]. [NiCl2(PPh3)2] Reacts with liquid hydrogen chloride to give NiCl2 and Ph3PH + HCl2–. The reactions of [Pt-(PPh3)4] with sulphuric and trifluoroacetic acids have also been studied.

Dosage du platine par spectrométrie d'absorption atomique: Partie II. Résultats analytiques sur les complexes or-ganométalliques d'intérêt biologique: effet cis-trans

An atomic-absorption spectrometric method is reported for the determination of platinum in a series of platinum complexes, with and without the use of spectrochemical buffers. The use of potassium phosphate and lanthanum chloride as buffer eliminated interference effects. The results were reproducible and accurate Platinum phosphine complexes were easily analysed. The cis and trans PtL 2L ' 2 (L,L ' are ligands) complexes soluble in water gave significant differences in absorbance in the absence of spectrochemical buffers, so that absorbance measurements differentiated cis- and trans-compounds in a given series. The cis-trans effect was also detected in organic solvents.

The Stereospecific Synthesis of Neutral and Cationic Tertiary Phosphine Complexes of Platinum(II)

Stereospecific synthetic methods for the preparation of complexes of the type cis- and trans[PtClL(PEt3)2]+ and cis-[PtClX(PEt3)2] have been developed. Preparations of complexes where L = py, PPh3, PClPh2, or P(OPh)3 and X = SCN, NO2, NO3, N3, NCO, or Br are described and it is shown that bridge cleavage reactions in square planar platinum(II) complexes occur with retention of stereo chemistry.

Hydrogen–deuterium exchange at a saturated carbon atom in tertiary phosphine complexes of platinum(II)

Complexes of the type Pt2Cl4L2, where L = PPr3 or PBu3, undergo hydrogen-deuterium exchange in solution to give complexes containing deuterium in the tertiary phosphine, specifically at C-3 of the alkyl group.

New substituted heteronuclear cluster carbonyls containing platinum and a metal from the Fe, Ru, Os triad

Low-valent phosphine–platinum complexes react with Fe2(CO)9, Ru3(CO)12, or H2Os(CO)4 to give heteronuclear cluster compounds of the types Fe2Pt(CO)10-nLn(n= 1 or 2), MPt2(CO)5L3, and M2Pt(CO)7L3(M = Ru, Os); the ligand L may be any one of a variety of substituted phosphines or phosphites, or triphenylarsine.

The coordinative reactivity of phosphine complexes of platinum(o), palladium(o) and nickel(o)

The coordinative reactivity of phosphine complexes of platinum(o), palladium(o) and nickel(o)

A phosphorus-31 nuclear magnetic resonance study of tertiary phosphine complexes of platinum(II)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA phosphorus-31 nuclear magnetic resonance study of tertiary phosphine complexes of platinum(II)Samuel O. Grim, Richard L. Keiter, and William McFarlaneCite this: Inorg. Chem. 1967, 6, 6, 1133–1137Publication Date (Print):June 1, 1967Publication History Published online1 May 2002Published inissue 1 June 1967https://doi.org/10.1021/ic50052a015RIGHTS & PERMISSIONSArticle Views748Altmetric-Citations200LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (614 KB) Get e-Alerts Get e-Alerts