Platinum Pt complex

Very recently, the first disulfur complexes of a tetracoordinated transition metal PtS2[P(Ar)Me2]2 (Ar=Tbt, Bbt) were synthesized by the reaction of ze-rovalent platinum complexes Pt[P(Ar)Me2]2> generated by treatment of the dichloride complexes PtCl2[P(Ar)Me2]2 with lithium naphthalenide, with elemental sulfur (Scheme 6) [37]. Since the use of excess elemental sulfur also... 

Platinum complexes Pt(PPh3)4 and PtCl2(PPh3)2, either alone or in combination with CP3CO2H, catalyze the selective monohydroamination of 1,3-butadiene with BnNH2 or PhNH2 (Eq. 4.49) in moderate yields [185]. Pd(0Ac)2/CF3C02H is also an efficient but less active catalytic system for this reaction [185]. 

The platinum complex [ Pt(dmpe) 2( X-H)2](OTf)2 can catalyze the generation of silanones from secondary silanols under very mild conditions (at room tempera-... 

The platinum complex Pt(PPh3)2C2H is inserted into Si-H and Ge-H bonds with the elimination of ethylene ligands ... 

Despite the interest in B(C6Fs)3 as a Lewis acid catalyst for organic reactions or a co-catalyst for olefinic polymerizations, little is known of its reaction with water. There is a report of the compound [NHEt3][HOB(C6F5)3] [158] and of the platinum complex, [Pt[HOB(C6Fs)3 Me(Bu2bpy)](Bu2bpy = 4,4 -di-ferf-butyl-2,2 -bipyridine),... 

The fluorescent complex [Ru(II)(3,4,7,8-tetramethylphen)3]Cl2 is readily taken up by P388 leukemia cells in culture and is visible on the cell surface, in the cytoplasm, and in the nucleus, but it does not exhibit antitumor activity in vivo (11). The platinum complexes [Pt(en)(oxalate)], [Pt(NH3)2(H20)2l (as the dinitrato complex), and [Pt(en)3] + also cause convulsions in animals (12) the latter two complexes are positively charged and relatively inert and the former is neutral and presumably undergoes an activation step before it binds to the neuromuscular junction. Curiously, the related malonato complex is not a neurotoxin. Care is taken in the clinic to administer cisplatin in saline solutions to avoid hydrolysis and minimize the production of neurotoxic aqua or hydroxobridged Pt(II) species. 

Another example is a series of platinum complexes [ Pt(PR2R") 2(p-PHR2) (p-PR j)] (see Fig. 7.37), where the same phenomena are observed as in the molybdenum complexes. The phosphorus atom engaged in the P-H-M agostic interaction is shielded compared to the other phosphorus atom, and the recorded Jp j coupling constants are much reduced to 136-151 Hz. The two terminal phosphanes have different chemical shifts, as expected, with the phosphane bonded to the hve coordinate platinum featuring a phosphorus resonance upheld to the phosphane bonded to the four coordinate platinum. 

The thermal decomposition of the platinum complex, [Pt(NH3)4.]Cl2H20, was studied on the derivatograph by Paulik et al. (77). Not only were the TG, DTG, and DTA curves recorded, but an analysis of the evolved gases was performed using thermal gas titrimetry (TGT) (see Chapter 8). The summation of seven curves for [Pt(NH3)4]Cl2 HzO are shown in Figure 4.18. Each curve represents the analysis curve for a specific gaseous decomposition product except for curve (1), which is the TG curve. According to the... 

Multiple exchange in the case of methane may be accounted for in the same way assuming the intermediate formation of a methylene-platinum complex, Pt=CH2. The distribution of deuterohydrocarbons, which does not depend on time... 

The prior r -coordination is also proposed for oxidative addition of phenyl-propargyl halides to zero-valent platinum complex Pt(PPh3)4, where Pt(PPh3)2 and Pt(PPh3)3 are active species for the oxidative addition. Kinetic study reveals slow formation of Pt(r/ -PhC=CCH2X)(PPh3) n = 2, 3), from which... 

The known four-co-ordinate platinum complexes Pt(PPh3)2(CF3 C2 CF3) and Pt(PPh3)2 (CFs)2CO have been prepared in a novel marmer by treatment of the stable bis(dibenzylideneacetone)platinum with triphenylphosphine and an excess of the unsaturated compound, or of the preformed Pt(PPh3)2(Dba) with the unsatur-... 

Glueck [116-121] came to the conclusion that the racemic secondary phosphines 197 form, with a platinum complex Pt(Me-Duphos)(Ph)(Br) and NaOSiMes in toluene, an adduct 198, which interconvert rapidly by P-inversion (5p)-198t (Pp)-198 [118]. Adduct 198 was isolated and studied by low-temperature NMR and X-ray monocrystal analysis. The crystal structure of the adduct showed that the major enantiomer of 198 has an (Pp)-absolute configuration [112],... 

There are emissive homoleptic bis(l-2-enedithiolate) Pt, Zn, Cd, and Hg dianions. Even though these complexes are isostructural, their excited state assignments differ. The homoleptic platinum complexes, [Pt(mnt)2] " and [Pt(qdt)2] ", have a lowest lying MLCT transition whereas the corresponding group UB complexes, [M(mnt)2] " (M = Zn, Cd, and Hg), [Zn(qdt)2] ", and [Zn(tdt)2] ", have what is best described as a lowest lying ILCT transition [16,29,36]. 

Figure 17 TEM of lipid-packaged platinum complex [Pt(en)2][PtCl2(en)2](20)4.

Investigations of zero valent group 10 metal complexes also revealed evidence for C-C cleavage of biphenylene. The platinum complex Pt(PEt3)3 reacts with biphenylene at 120°C to give tetraphenylene [14]. Two platinum-containing intermediates are observed by P NMR spectroscopy. One was identified as the C-C insertion complex 2 and the other as the tetraphenylene insertion complex 3 (Scheme 4). Complex 2 forms if the reaction is carried out at 80 C with... 

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