52595-94-5Relevant articles and documents
The microwave synthesis of platinum(II) phosphine complexes
Dopke, Nancy Carter,Oemke, Holly E.
, p. 638 - 640 (2011)
The microwave synthesis of a series of platinum(II) phosphine complexes is reported. The complexes dppePtCl2 (dppe = bis(diphenylphosphino) ethane), dpppPtCl2 (dppp = bis(diphenylphosphino)propane), dppmPtCl2 (dppm = bis(diphenylphosphino)methane) and cis-(Ph 3P)2PtCl2 are synthesized from the reaction of potassium tetrachloroplatinate(II) and the phosphine. The isolated yields are 65% or better.
Simple, High Yield Synthesis of Heterobimetallic Complexes of Ph2PCH2PPh2 (dppm) with Platinum, Mercury, and Silver
McEwan, David M.,Pringle, Paul G.,Shaw, Bernard L.
, p. 1240 - 1241 (1982)
Treatment of the readily available salts 2X (dppm = Ph2PCH2PPh2) with (i) Hg(CCR)2 or (ii) Hg(OAc) + RCCH or (iii) Hg(CN)2 gives virtually quantitative yields of Y2Pt(μ-dppm)2HgX2 (Y = CCR or CN, R = Ph, p-tolyl, Me, or Prn, X = Cl)
BIMETALLIC SYSTEMS. PART 4. SYNTHESIS AND CHARACTERISATION OF MIXED COPPER(I)-, SILVER(I)-, OR GOLD(I)-PLATINUM(II) ACETYLIDE COMPLEXES CONTAINING BRIDGING Ph2PCH2PPh2
Cooper, Gary R.,Hutton, Alan T.,Langrick, Richard C.,McEwan, David M.,Pringle, Paul G.,Shaw, Bernard L.
, p. 855 - 862 (1984)
The bis(monodentate dppm)diacetylide complexes of type trans-CR)2(dppm-P)2> (dppm = Ph2PCH2PPh2; R = Ph, p-tolyl, Me, etc.) react with silver nitrate or silver hexafluorophosphate to give mixed platinum-silver salts of the type C)2Pt(μ-dppm)2Ag>X (X = NO3- or PF6-) or with 4> (X = Cl or I) to give neutral platinum-silver complexes, C)2Pt(μ-dppm)2AgX> (X = Cl or I), in excellent yield.The salts and neutral complexes can be interconverted, e.g. the nitrate salt with NaI gives the neutral platinum-silver iodide complex and when the neutral platinum-silver chloride complex C)2Pt(μ-dppm)2AgCl> is treated with in acetone the corresponding - salt is formed.A more convenient method of synthesis of the complex C)2Pt(μ-dppm)2AgX> is to treat X2 (X = Cl or I) with two equivalents of AgO2CMe + PhCCH.Treatment of X2 with one equivalent of AgO2CMe + RCCH gives platinum-silver monoacetylides of type C)ClPt(μ-dppm)2AgCl> (R = Ph, p-tolyl, Me, CH2CH2Ph, or CMe=CH2).In 'one-pot' reactions PtCl2 (or K2) was treated with two equivalents of dppm followed by one equivalent of AgO2CMe + PhCCH to give the complex C)ClPt(μ-dppm)2AgCl> in 71percent overall yield.This chloro-complex, when treated with LiBr or NaI in dichloromethane-acetone, gave the corresponding bromo- or iodo-complexes )CXPt(μ-dppm)2AgX> (X = Br or I) in ca. 90percent yields.Treatment of CC6H4Me-p)2(dppm-P)2> with gave the platinum-gold complex salt C)2Pt(μ-dppm)2Au>Cl.Treatment of Cl2 with LiCPh)2> gives C)2Pt(μ-dppm)2CuCl>, which in acetone solution + Na gives the correspondng salt C)2Pt(μ-dppm)2Cu>.All of the complexes were characterised by microanalysis, solution conductivity measurenments, i.r. spectroscopy, and particularly (31)P- and (1)H- n.m.r. spectroscopy.The variable-temperature (1)H- and (31)P- n.m.r. spectra of the complexes are discussed.
Combinatorial approach to chiral tris-ligated carbophilic platinum complexes: Application to asymmetric catalysis
Pradal, Alexandre,Gladiali, Serafino,Michelet, Veronique,Toullec, Patrick Y.
supporting information, p. 7128 - 7135 (2014/06/09)
A straightforward methodology for the synthesis of libraries of chiral tris-ligated cationic platinum complexes and their in situ evaluation as asymmetric carbophilic catalysts in a model domino hydroarylation/cyclization reaction of a 1,6-enyne was developed. A catalyst-generation process based on a combination of a monodentate and a bidentate phosphorus ligand allowed the formation of 108 chiral complexes. One-pot screening of the stereoinduction obtained with this library in a test domino addition/cyclization reaction validated this approach and stressed the key role played by the monodentate ligand partner in obtaining high enantioselectivities. In the case of two challenging substrate/nucleophile combinations, the combinatorial approach resulted in a significant gain in enantioselectivity.
Pt-Me bond cleavage in the reactions of dimethylplatinum(II) complexes containing chelating phosphine ligands with organotin(IV) chlorides
Momeni, Badri Z.,Eatezadi, Sedigheh
, p. 1288 - 1291 (2014/01/06)
Selective Pt-Me bond activation of dimethylplatinum(II) complexes [PtMe2(PP)] (PP = dppm (bis(diphenylphosphino)methane), dppe (1,2-bis(diphenylphosphino)ethane), dppp (1,3-bis(diphenylphosphino)propane)) was achieved by SnMe2Cl2 to yield the corresponding platinum(II) complexes [PtMeCl(PP)] (PP = dppm, dppe, dppp) and cis-[PtCl 2(PP)] (PP = dppm, dppp). On the other hand, the reactions of complexes [PtMe2(PP)] (PP = dppm, dppe, dppp) with SnPh3Cl resulted in the selective cleavage of the Pt-Me bond to afford the methylplatinum(II) complexes [PtMeCl(PP)]. Notably, the reaction of [PtMe 2(dppm)] with SnMe2Cl2 and SnPh3Cl also gave the ionic A-frame complex [Pt2Me2(μ-Cl)(μ- dppm)2]Cl. The variable-temperature 1H and 31P NMR spectroscopy shows that the cleavage of the Pt-Me bond occurs very rapidly and the short-lived platinum(IV) intermediate is difficult to detect during the reaction. An explanation is presented on the basis of the nature of the strong π-acceptance of the phosphine ligand, which resulted in the formation of a very unstable platinum(IV) intermediate.
