Platinum acetylacetonate complexes

As for the hydrido compounds, the nmr spectra of alkyl complexes have been studied in detail.35 It may be noted that platinum acetylacetonate complexes often have Pt—C bonds to the "/-carbon atom rather than the usual metal—oxygen bonding, and the acetylacetonate is thus unidentate as in PtCl(acac) (diphos).36... 

An acetylacetonate platinum(II) complex [PtMe3(acac)]2 is one of the few complexes for which 195Pt chemical shift anisotropy has been measured in the solid state.1605... 

Molybdenum trioxide, intercalation into, 12, 823 Molybdocenes, as anticancer agents, 1, 892 MOMNs, see Metal-organometallic coordination networks Monisocyanides, with silver(I) complexes, 2, 223 Monitoring methods, kinetic studies, 1, 513 Mono(acetylacetonate) complexes, with Ru and Os halfsandwich rf-arenes, 6, 523 tj2-Monoalkene monodentate ligands, with platinum divalent derivatives, 8, 617 tetravalent derivatives, 8, 625 theoretical studies, 8, 625 zerovalent derivatives, 8, 612... 

Reactions of acetylacetonates with silica are not as general as with alumina. Cu(acac)2 is adsorbed on the silica in high concentrations while the platinum and palladium complexes do not interact with the silica at all and are easily removed by washing. No adequate explanation of these differences was proposed. 3 palladium acetylacetonate complex was also used for the... 

Forrest and Thompson have demonstrated high-efficiency, high-brightness red phosphorescent OLEDs employing cyclometalated benzothienylpyri-dine (btp) iridium and platinum complexes [43], such as in (2-(2 -benzo[4,5-a]thienyl)pyridinato-N,C3 )platinum(acetylacetonate), [Pt(btp)(acac)] 41. 

A second t q)e of 3-carbon-bonded acetylacetonate complex is illustrated by the trimethyl(acetylacetonato)platinum(IV) dimer. Although the X-ray crystal structure analysis has not been carried out for this specific complex, both X-ray and neutron diffraction studies have been done for the analogous trimethyl(nonane-4,6-dionato)platinum(IV) complex (25, 26). This and other similarities suggest that the acetylacetonate complex has the same structure. The structure of the nonane-4,6-dionate complex is illustrated in Fig. IE along with some selected bond lengths. Compounds of this kind have been referred to as bridgebonding complexes by Gibson (23). 

Electrophilic attack at the co-ordinated ligand has been demonstrated for acetylacetone complexes of platinum and of palladium. Several reactions... 

In the one-step synthesis of FePt nanoparticles, platinum acetylacetonate (Pt(acac)2) and iron pentacarbonyl (Fe(CO)5) and Fe(CO)5 was mixed at excess of stabilizers at 100 °C, then the mixture was heated to more than 200 °C, and kept it at that temperature for Ih, before it was heated to reflux [215, 223]. It was found that with benzyl ether as solvent and oleic acid and oleylamine as stabilizers, one-pot reaction of Fe(CO)5 and Pt(acac)2 could give nanosized FePt particles (3 - 4 nm). Size, composition, and shape of the particles were controlled by varying the synthetic parameters such as molar ratio of stabilizers to metal precursor, addition sequence of the stabilizers and metal precursors, heating rate, heating temperature, and heating duration. Monodisperse FePt nanocrystals were prepared by hydrolysis of pentacarbonyl iron and reduction of metal complexes in the presence of oleic acid and oleylamine [215]. 

As described by the Kutal research group, another approach to the photoinitiated anionic polymerization of ethyl 2-cyanoacrylate involves the photolysis of the platinum bis(acetylacetonate) complex, 117. The irradiation of 117 at wavelengths above 300 nm results in the liberation of the acetylacetonate anion (118, Scheme 35) that is capable of initiating the polymerization of the monomer in a manner similar to the thiocycanate anion as shown in Scheme 34. 

Olefin-metal complexes are frequently labile, especially those of copper, silver and gold, and treatment of most olefin-metal complexes with ligands such as tertiary phosphines results in the displacement of the olefin. In the square-planar acetylacetonate complex (acac)Rh(C2H4)2 the ethylenes readily exchange with free ethylene - as is also found in the square-planar platinum-olefin complexes [17]. In these planar molecules exchange of olefins may involve olefin attack on the exposed metal atom, via a five-co-ordinated intermediate [65, 66]. 

Platinum blue formation, 2,265 Platinum complexes, S, 351-500 acetylacetone reactions, 2,380 acetylides reactions, 5,402 alcohols, 5,465 alkene-1,2-dithiolates optica] recording systems, 6,126 alkenes, 5,403 bonding, 5,403... 

In the early work on the thermolysis of metal complexes for the synthesis of metal nanoparticles, the precursor carbonyl complex of transition metals, e.g., Co2(CO)8, in organic solvent functions as a metal source of nanoparticles and thermally decomposes in the presence of various polymers to afford polymer-protected metal nanoparticles under relatively mild conditions [1-3]. Particle sizes depend on the kind of polymers, ranging from 5 to >100 nm. The particle size distribution sometimes became wide. Other cobalt, iron [4], nickel [5], rhodium, iridium, rutheniuim, osmium, palladium, and platinum nanoparticles stabilized by polymers have been prepared by similar thermolysis procedures. Besides carbonyl complexes, palladium acetate, palladium acetylacetonate, and platinum acetylac-etonate were also used as a precursor complex in organic solvents like methyl-wo-butylketone [6-9]. These results proposed facile preparative method of metal nanoparticles. However, it may be considered that the size-regulated preparation of metal nanoparticles by thermolysis procedure should be conducted under the limited condition. 

In the related compound a-a -dipyridyl-acetylacetonato trimethyl platinum, which is monomeric, five of the coordination positions are taken up by the dipyridyl nitrogen atoms and the methyl groups. The sixth position is occupied by the central carbon atom of the acetylacetone, not by one of the oxygen atoms 242a). The oxygen atoms then remain uncoordinated, and the rest of the acetylacetone group is considerably distorted from the highly symmetrical form it normally has in complexes. This is the only... 

Acetylacetone usually forms transition metal complexes by coordination through bidentate oxygens. Since platinum forms unusually strong bonds to carbon, acetylacetonato complexes of platinum(II) are frequently C-bonded. When Pt(acac)2 is treated with 1 mole of pyridine, a bidentate oxygen-bonded acetylacetonate ligand is converted to a y-carbon-bonded ligand. 

Ammine ligands complexed to platinum(IV) will undergo condensation reactions with acetylacetone. Thus Pt(NH3) + and acetylacetone react rapidly to give the diimine complex (equation 332).1032... 

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