Platinum compounds anions

Louis-Nicolas Vauquelin (1763-1829) discovered the pink compound tetraamminepalladium(II) tetrachloropalladate(II), [Pd(NH3)4][PdCl4].14 This compound, which contains coordinated palladium in both the cation and the anion, is still known as Vauquelin s Salt after its discoverer. The corresponding platinum compound, [Pt(NH3)4][PtCl4], was discovered by Heinrich Gustav Magnus (1802—1870).15 It constitutes the first discovered platinum ammine and is known as Magnus ... 

Platinous compounds [see specific compounds under Platinum (II)] Platinum (II) chloride, 5 208 6 209 analysis of, 5 209 Platinum (IV) chloride, 2 253 Platinum (II) complex compounds, anions, with 1,4-butadiene, K2[Cl3PtC4H6PtCI3], 6 216 anions, with ethylene, [Pt(C2H4)-CU]K, 5 211, 214... 

A square-planar coordination is also met in the monoclinic PdP2 structure (58) of the semiconducting compounds NiP2, PdP2 and PdPAs (59). The anions are tetrahedrally surrounded by two cations plus two anions (Fig. 15). Here the anions form twisted zig-zag chains, so that these phases are also polycompounds and the cations are divalent. It is noteworthy that in the corresponding platinum compounds Pt is tetravalent like in the disulfide. Application of pressure may induce this valence state also... 

Ruiz J, Lorenzo J, Sanglas L, Cutillas N, Vicente C, Villa MD, Aviles FX, Lopez G, Moreno V, Perez J, Bautista D (2006) Palladium(II) and platinum(II) organometallic complexes with the model nucleobase anions of thymine, uracil, and cytosine antitumor activity and interactions with DNA of the platinum compounds. Inorg Chem 45 6347-6360... 

A series of rhodium and platinum compounds have been tested in the hydroamination of norbomene with aniline, as shown in Scheme 9.36.[141] Selectivity and activity were highly dependent on the nature of the ionic liquid, but were always superior to those observed in THF. Solvents with chloride anions led to essentially no catalytic activity, whereas [PF6] or Br afforded some catalysis. Nonetheless, even with the best solvent/catalyst combination, less than 40 turnovers are achieved after 6 days at 140°C. 

The discovery, ca. 1968, by B. Rosenberg, that the cis isomer has anti-tumor activity stimulated the synthesis and screening of over 2000 different types of complexes with different amines and anionic ligands. Platinum compounds are among the most effective medications for the treatment of advanced cancer PtCl2(NH3)2 ( Cisplatin ) is mainly used for the treatment of testicular and ovarian cancer. One of its drawbacks are the severe toxic side-effects which may be related to the facile hydrolysis of Cl ligands under physiological conditions ... 

Transition metals with odd atomic numbers cannot achieve the expected FAN in monomeric compounds. In cases where carbonyls of these elements are known, the compormds contain more than one metal atom and metal-metal bonds these effectively contribute one extra electron to each metal Mn2(CO)io, Co2(CO)s. Many polynuclear metal carbonyls are known. The largest metal cluster that has been characterized is a polynuclear platinum carbonyl anion,... 

Both the cation and the anion can be metal complex ions, yielding another type of isomer. The following copper-platinum compounds provide an example ... 

Although cobalt compounds were the most prevalent subject of his research program, Werner and his collaborators worked with other metals as well. As an example, consider the following series of platinum compounds presented in their modern format. Note that in this case the series is extended to include anionic... 

Batsanov et al. 23) reacted sulfur with PtCU and PtBr2 by heating mixtures of the reactants in evacuated, sealed ampoules. At 100 -200°C after 12-24 h, sulfide chlorides PtCljS (1.70 < x < 2 0.6 s y < 3.35) and sulfide bromides PtBr S (1.87 < x 2.06 0.84 y s 1.80) were formed. The compositions depended on the initial PtX2 S ratio, and the temperature. At 320-350°C, loss of chlorine led to the compounds PtClS (1.7 y 1.9). According to their X-ray powder patterns, all of these products retained the main structural features of the original platinum halides. From considerations of molar volumes, the authors deduced the presence of polysulfide anions. 

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