17030-86-3Relevant articles and documents
Solvent-free mechanochemical synthesis of two Pt complexes: Cis-(PH3P)2PtCl2 and cis-(Ph3P)2PtCO3
Balema, Viktor P.,Wiench, Jerzy W.,Pruski, Marek,Pecharsky, Vitalij K.
, p. 1606 - 1607 (2002)
Cis-(Ph3P)2PtCl2 and cis-(Ph3P)2PtCO3 were prepared mechanochemically from solid reactants in the absence of a solvent; cis-(Ph3P)2PtCl2 was obtained in 98% yield after ball-milling of polycrystalline PtCl2 and Ph3P; the mechanically induced solid-state reaction of cis-(Ph3P)2PtCl2 with an excess of anhydrous K2CO3 produced cis-(Ph3P)2PtCO3 in 70% yield; the formation of transition metal complexes as a result of mechanochemical solvent-free reactions has been confirmed by means of solid-state 31P MAS NMR spectroscopy, X-ray powder diffraction and differential thermal analysis.
Heterobimetallic dioxygen activation: Synthesis and reactivity of mixed Cu-Pd and Cu-Pt bis(μ-oxo) complexes
York, John T.,Llobet, Antoni,Cramer, Christopher J.,Tolman, William B.
, p. 7990 - 7999 (2008/02/04)
Heterobimetallic CuPd and CuPt bis(μ-oxo) complexes have been prepared by the reaction of (PPh3)2MO2 (M = Pd, Pt) with LCu(I) precursors (L = β-diketiminate and di- and triamine ligands) and characterized by low-temperature UV-vis, resonance Raman, and 1H and 31P{1H} NMR spectroscopy in conjunction with DFT calculations. The complexes decompose upon warming to yield OPPh3, and in one case this was shown to occur by an intramolecular process through crossover experiments using double-labeling (oxo and phosphine). The reactivity of one of the complexes, LMe2Cu(μ-O)2Pt(PPh 3)2 (LMe2 = β-diketiminate), with a variety of reagents including CO2, 2,4-di-tert-butylphenol, 2,4-di-tert-butylphenolate, [NH4][PF6], and dihydroanthracene, was compared to that of homometallic Pt2 and Cu2 counterparts. Unlike typical [CU2(μ-O) 2]2+ cores which have electrophilic oxo groups, the oxo groups in the [Cu(μ-O)2Pt]+ core behave as bases and nucleophiles, similar to previously described Pt2 compounds. In addition, however, the [Cu(μ-O)2Pt]+ core is capable of oxidatively coupling 2,4-di-terf-butylphenol and 2,4-di-tert-butylphenolate. Theoretical evaluation of the electron affinities, basicities, and H-atom transfer kinetics and thermodynamics of the Cu2 and CuM (M = Pd, Pt) cores showed that the latter are more basic and form stronger O-H bonds.
Syntheses, Spectra, and Structures of (Diphosphine)platinum(II) Carbonate Complexes
Andrews, Mark A.,Gould, George L.,Klooster, Wim T.,Koenig, Kristina S.,Voss, Eric J.
, p. 5478 - 5483 (2008/10/09)
A variety of (diphosphine)platinum(II) carbonate complexes, (LL)Pt(CO3), are readily prepared from the corresponding (diphosphine)platinum dichlorides by treatment with silver carbonate in dichoromethane solution provided that water is present. This reaction also permits facile preparation of analogous 13C-labeled complexes. The carbonate ligands in these complexes have been characterized by IR and 13C NMR spectroscopy. Alternative preparative routes involve conversion of the precursor dichlorides to the corresponding dialkoxides or diphenoxides, followed by treatment with water and carbon dioxide. Various reaction intermediates have been spectroscopically observed in the latter syntheses. Two crystalline modifications of (Ph2PCH2CH2CH2PPh 2)Pt(CO3), one with and one without a dichloromethane of solvation, have been studied by single-crystal X-ray diffraction. Crystal data for PtP2O3C28H26: P21/c, Z = 4, T = 200 K, a = 10.362(8) ?, b = 14.743(6) ?, c = 19.183(10) ?, β = 122.69(6)°. Crystal data for PtP2O3C28H26·CH 2Cl2: P21/c, Z = 4, T ≈ 298 K, a = 11.744(2) ?, b = 15.526(3) ?, c = 15.866(3) ?, β = 101.58(1)°.
