Silver complexes acetylacetone

Other methods reported for the determination of beryllium include UV-visible spectrophotometry [80,81,83], gas chromatography (GC) [82], flame atomic absorption spectrometry (AAS) [84-88] and graphite furnace (GF) AAS [89-96]. The ligand acetylacetone (acac) reacts with beryllium to form a beryllium-acac complex, and has been extensively used as an extracting reagent of beryllium. Indeed, the solvent extraction of beryllium as the acety-lacetonate complex in the presence of EDTA has been used as a pretreatment method prior to atomic absorption spectrometry [85-87]. Less than 1 p,g of beryllium can be separated from milligram levels of iron, aluminium, chromium, zinc, copper, manganese, silver, selenium, and uranium by this method. See also Sect. 5.74.9. 

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... 

In order to realize an industrial process it was very important that cationic rho-dium(I)-bisphosphinites could be obtained without the use of silver salts. For this purpose neutral rhodium(I)-bisphosphinite-cydooctadiene-acetylacetonate was prepared according to Fig. 7 and transformed into a cationic species by readion with acids, particularly sulfuric add (Fig. 8, A=HS04). This could also be achieved as a one pot reaction [19]. It should be noted that in addition we improved the existing procedures for the preparation of the precursor complexes [Rh(cod)Cl]2, Rh(cod)acac [20] and [Rh(cod)2]BF4. 

Schiff base complexes of transition metal ions have occupied a central role in the development of coordination chemistry. In particular, the tetradentate ligands acacenH2 (46) and salenH2 (47), prepared from ethylenediamine and acetylacetone or salicylaldehyde, have been thoroughly investigated since their discoveries in 1889 and 1931. Most of these studies have dealt with divalent metal ions such as Co , Ni or Cu and there are relatively few reports concerning silver(I) complexes. ... 

Peaks are found in range 600-700 cm should usually relate to metal complexes with acetylacetone [19, 20]. IR spectra AA and AA with Ag+ ion calculations were carried out by ab initio method with 6-2IG basis set. PM3 wasn t used due this method hasn t necessary parametrization for silver. In the case of IR spectra ab initio computation unavoidable calculating error is occurred hence all peaks have some displacement. Peak 549 cm" (Figure 8.15(b)) is equivalent to peak 638 cm (Figure 8.15(c)) obtained experimentally and it is more intensive than similar one on Figure 8.4. Peak 1974 cm" was displaced to mark 1919 cm and became far intensive. It can be explained Ag-h influence and coordination bonds between metal and AA formation. 

The preparation of natural rubber-gra/t-methyl methacrylic acid has been reported by Lenka and coworkers. The vanadium ion was used as an initiator, which initiated the creation of free radicals on the backbone of natural rubber and this increased the interaction between the natural rubber and the methyl methacrylate surfaces. The coordination complexes derived from the acetylacetonate of Mn(III) ions could also be used as an initiator to form the natural rubber-gra/t-methyl methacrylic acid. Under different conditions, silver ions could be used as a catalyst to produce natural rubber-gra/t-methyl methacrylic acid with different concentrations of methyl methacrylic acid monomers, and potassium peroxydisulfate as an initiator. Consequently, these methods were successful in the preparation of compatible blended natural rubber and methyl methacrylic acid by graft copolymerization. This compatibility was confirmed by nuclear magnetic resonance and infrared spectroscopy techniques. The interaction between natural rubber and methyl methacrylic acid was significantly increased and was useful for further blending with other polyacrylate molecules or different polymer types. 

Self-assembly of a diruthenium precursor 285 as a bimetallic connector with tris-pyridyl ligand syntone 241 in the presence of silver(l) ions by Scheme 4.35 afforded a cationic TP (arene)ruthe-ninm Rne Ls La coordination capsule 540 [36]. This capsule encapsulates palladium and platinnm(ll) acetylacetonates to give the corresponding 1 1 cage complexes [36]. In the platinum-... 

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]. 

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