It is suggested, from a review of published literature, that plutonium acetylacetonate crystals are isomorphous with the beta -forms of zirconium and thorium acetylacetonates. (C.J.G.)
Energy Citations Database
Stabilization and destabilization of zirconium propoxide precursors by acetylacetone Gerald I mechanism in the action of acetylacetone on zirconium propoxide precursors is revealed; the nature ligands by chelating organic ligands.1 In sol�gel studies, acetic acid and acetylacetone are most often
E-print Network
... Abstract : A theory of bonding in ylides is presented for the first time as is a theory of bonding in acetylacetonates of main-group elements and their ...
DTIC Science & Technology
... Abstract : The decomposition of pure acetylacetone occurs uniformly in the temperature range of 374-540C in accordance with a time law of the first ...
The most effective of these was acetylacetone. In one case the addition of 10 cc of acetylacetone to 40 cc of electrolyte on the ...
NASA Website
Mercury acetylacetonate. Mercury diphenyl. Copper formate. Copper acetylacetonate. Copper-8-quinolinolate. Potassium biphthalate. Teflon. Mylar. Polystyrene ...
The countercurrent distribution behavior of the rareearth acetylacetonates in different solvent systems was studied. Solubilities of the chelates in various solvents were determined in order to obtain data on the partition coefficients. The hydrated rare-earth acetylacetonates hydrolyze upon dissolving in benzene. Excess ...
The rate of the exchange of the acetylacetonate ligand between several organometallic acetylacetonates and the proton chelate, acetylacetone, have been studied using pmr spectroscopy. The order of increasing exchange rate is Cl2Sn(acac)2
National Technical Information Service (NTIS)
and tin bis(acetylacetonate) dichloride in acetylacetone solvent at 90 1C on a hot plate. The In and Sn precursors are not soluble in alcohol or water, thus acetylacetone is used to both promote their solubility
The decomposition of pure acetylacetone occurs uniformly in the temperature range of 374-540C in accordance with a time law of the first order. The question arose of the disintegration velocity of the chelates. Copper acetylacetonate was the pattern subst...
force describing the tautomerization reaction in acetylacetone.2 These results suggest transfer tautomerization reaction in the enol form of acetylacetone was studied using an empiri- cal valence bond potential.2 Although acetylacetone differs chemically from malonaldehyde due
The products formed during the irradiation of acetylacetone by Co/sup 60/ gamma radiation were determined by chromatography in the gaseous phase. Acetylacetone is more stable with respect to radiation than the aliphatic ketones already studied. This radioresistance is attributed to the structure of the irradiated compound. (tr-auth)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210 Abstract The properties of excited electronic states of acetylacetonate complexes of palladium: Palladium; Platinum; Acetylacetonate ligands; Spectroscopy; Luminescence; Photochemistry; Photofragmentation pathways of these complexes [1�5]. The ...
Certain metal acetylacetonates undergo reactions characteristic of aromatic systems. Outstanding among these are electrophilic substitutions and the formation of a stable diazonium fluoroborate. Unsymmetrically substituted chelates were prepared by stepwi...
acetylacetone (as a nominally nonaque- ous solvent). YSZ powder was stably sus- ... Acetylacetone. Poly(tetrafluoroethelyne). Electrode Holders. DC Power ...
When acetylacetone was added dropwise to Ti(NMe2) 4 in benzene ... the acetylacetone solution?. A reaction was also carried out using acetylsalicylic ...
Mar 1, 2011 ... hide Your Search Criteria. Related Subjects: ACETYLACETONE ... scrubbers containing acetylacetone solutions as scrubbing liquors. ...
+ ) . , , . , . (dimethyl zinc), (diethyl zinc), (zinc acetylacetonate), (zinc iodide) , (manganese acetate), (manganese acetylacetonate), (manganese carbonate), (manganese bromide), (manganese
... Abstract : The vapor pressures of several metal chelates of acetylacetone, trifluoroacetylacetone and hexafluoroacetylacetone were measured in ...
... COMPLEX COMPOUNDS), (*COBALT COMPOUNDS, COMPLEX COMPOUNDS), (*CHROMIUM COMPOUNDS, COMPLEX COMPOUNDS ...
... hand, the compound decomposes into ... Organometallic Decomposition, Rhodium Acetylacetonate ... ORGANOMETALLIC COMPOUNDS, *THERMAL ...
... THE EFFECT OF CHEMICAL MODIFICATION OF ZIRCONIUM N-PROPOXIDE BY ACETYLACETONE ON GELATION TIME, GEL STRUCTURE ...
... Abstract : Acetylacetone, benzoylacetone, dibenzoylmethane, salicylaldehyde, and 8-quinolinol react with diphenyltin dichloride to produce tin ...
... Accession Number : AD0848434. Title : Kinetics and Mechanism of the Thermal Disintegration of Acetylacetone,. Corporate ...
% of TTP (Tables 1 and 2). The Figure 2. Chemical structures of hexafluoro acetylacetone (HFA), deuterated hexafluoro acetylacetone (HFA-d), tet- rakis-Eu or Sm hexafluoro acetylacetonate tetra ethylam- monium of triphenyl phosphate (TPP) and various ligands: trifluoro acetylacetone (TFA) and dibenzoyl methane (DBM
The acetylacetonate of Zr (Hf) was irradiated with thermal neutrons and the chemical effects were studied by applying the sublimation method. The retention values of /sup 95/Zr, /sup 97/Zr and /sup 181/Hf we re found nearly the same and similar to that of /sup 231/Th produced by the (n,2n) reaction of thorium acetylacetonate. Furthermore, it was ...
Acetylacetone extracts the lanthanides from aqueous solution at pH values between four and six. The solubility and extractability of the rare earth acetylacetonates vary with the ionic radii of the central metal ions. Extraction of the lanthanides with acetylacetone is enhanced by the decrease in basicity of the central metal ...
... the temperature range of 60 to 200C for the chromium and aluminum chelates of hexafluoroacetylacetone, trifluoroacetylacetone, and acetylacetone ...
PROCEDURE FexNi1-x nanoparticles were prepared by chemical re- duction in iron III acetylacetonate acetylacetonate and nickel II acetylacetonate were added to a 100 ml three-neck round bottom flask III acetylacetonate to the starting materials. To reduce the oxide shell that forms during synthesis
Hf complexing with acetylacetone at 25 deg plus or minus 0.l and ionic strength 1.0 mole was studied, and acetylacetone dissociation and distribution constants were determined. The distribution constant of noncharged hafnium complex with acetylacetone in the system C/sub 6/H/sub 6/--H/sub 2/O is lambda /sub 4/ = l0.30 + ...
... THE FILMS DIFFERED DUE TO THE ADDITION OF DIFFERENT CONCENTRATIONS OF ACETYLACETONE TO THE PRECURSOR SOLUTION ...
Substituted Pyrimidine from Cyanogen and Acetylacetone Catalyzed by Acetylacetonate Complexes of Transition The reactivity of various metal acetylacetonate complexes [M(acac),] (n = 2 for M = Mn", Fe", Co", Cu", Pd"; n, are given and discussed. Introduction The reaction between cyanogen and acetylacetone at am- ...
Acetylacetone has been employed as both a chelating agent and solvent in solvent extraction studies. To determine the formation constants, the extraction behavior of seven acetylacetonates was studied. Allowing for the presence of charged intermediates, the successive formation consiants for nine acetylacetonates were ...
Three crystalline modifications of uranyl acetylacetone monohydrate have been prepared and their unitcell parameters, infrared spectra, visible spectra, and magnetic susceptibilitie s studied. Crystalline solvates of uranyl acetylacetone have also been prepared with ethanol, dioxan, acetylacetone, and acetophenone. The ...
Conditions for the extraction of uranium with chloroform as its acetylacetonate were investigated. Extraction recovery of uranium acetylacetonate was increased with increasing concentration of acetylacetone in aqueous solution at the optimum pH value of 6 to 7. The presence of sodium chloride increased the extraction yield of ...
A theory of bonding in ylides is presented for the first time as is a theory of bonding in acetylacetonates of main-group elements and their derivatives. Some novel structures are presented for each of these, and based on the theory it is expected that th...
[b]thienyl)pyridinato, and acac is acetylacetonate. The iridium units are covalently attached to and in conjugation with oligo(9 acetylacetonate (acac) complexes 10-13 as shown in Scheme 2. The 1H NMR spectra showed that the peaks due
(acetylacetonato)titanium(IV) (Ti(acac)4).17 Despite extensive investigations of titanium- acetylacetonate complexes, the synthesisHg). Importantly, metal-acetylacetonate complexes are widely used as source compounds in film depositions.18
by the reaction of metal acetylacetonates with the carboxylato- alumoxane in a suitable solvent. The metal with the metal acetylacetonates (or soluble metal salts) do not lead to the metal exchange reaction observed
technique in argon atmosphere. In a typical procedure, 0.5 mmol of platinum acetylacetonate was added to 125 as an iron precursor. Iron acetylacetonate (0.5 mmol) was added at room temperature while iron pentac
]. In sol�gel studies, acetic acid and acetylacetone are most often applied for this purpose [9]. Acetic showed [10] that the sta- bilizing effect with acetylacetone disappears beyond addition of 1 mol
) polyol process and heterogeneous nucleation of Co nuclei on dis- persed CNTs; acac: acetylacetonate and the metal electrodes. Experimental Fabrication of CNT/Metal Nanoparticles: Cobalt(II) acetylacetonate (Co
The thermal disintegration of acetylacetone is submitted to a thorough investigation utilizing both statically and dynamically operating measuring apparatus. Under static test, disintegration satisfactorily occurred in the range of 375 to 450C, with an in...
A polyol cured, ferric acetylacetonate catalyzed polybutadiene based elastomer, designated EN-8, was developed which was curable at room temperature, bonded well to aluminum and was compatible with explosives that did not contain aromatic nitro groups. Th...
copper acetylacetonate. Another key feature of chemical vapor synthesis is that it allows formation(II) acetylacetonate vapor decomposition in the presence of oxygen. Aerosol Sci Technol 2002;36:899�911. w23x Schmechel
by acetylacetone (equimolar quantities with respect to 1), a known inhibitor of 33F12, suggesting that retinal only with authentic sample of 2).17In a control experiment a mixture of 1 (10.2M in acetone, 5 ItL), acetylacetone
The electrochemical reduction of acetylacetone has been investigated in acetonitrile solvent. Unlike the reduction of aromatic beta-diketones, this aliphatic example's reduction is one involving a one-electron transfer with evolution of hydrogen and produ...
Uranyl acetylacetonate (UAA) is an organic complex of uranium used for military applications as a chemical catalyst in high explosives. It is prepared from depleted uranium metal (in lots of 5 kg to 7 kg) by dissolution in nitric acid, neutralization, and...
The spectroscopic proprieties of two energetically close conformers of acetylacetone have been investigated using density functional methods. The calculated anharmonic frequencies are in very satisfactory agreement with experimental data. The low height of the conversion barrier explains why the signature of both conformers can be found in the vibrational spectrum.
NASA Astrophysics Data System (ADS)
sulfonic and sulfdc acids, organic phosphonic and phosphinic acids, and metallic acetylacetonates. The term "substantially anhydrous conditions" as ...
sulfonic and sulfinic acids, organic phosphonic and phosphinic acids, and metallic acetylacetonates. The term "substantially anhydrous conditions" as ...
... Two metal derivatives of fluorinated acetylacetone containing cadmium were pd, one ionic in nature and the other covalent. ...
of platinum acetylacetonate and decomposition of iron pentacarbonyl in the presence of oleic acid and oleyl
... Abstract : Chelating agents, such as acetylacetone (AcAcH) and ethylacetoacetate (EAA) are used to avoid the undesirable precipitation of ...
The extraction of cerium with acetylacetone was studied using Ce/sup 144/ as a tracer. Cerous ions could not be extracted without an oxidizing agent. After the mixture of 0.61M acetylacetone, 0.65M sodium bromate, and 5 x l0/sup -6/ M cerium was left standing for l00 min at pH 5 to 6, 95% of the cerium was extracted in benzene. The reaction was ...
... were obtained of the stimulated Raman effect of anisole, chlorobenzene, chloroprene, dichlorethane, acetophenone, acetylacetone, and chloroform ...
Vacuum sublimation was performed on an aged thorium acetylacetonate for studying the behavior of the daughter nuclides in the thorium decay series. The purified thorium acetylacetonate was irradiated with either reactor neutrons or 14-MeV neutrons and sublimed after irradiation to examine the behavior of /sup 233/Th and /sup 233/Pa or /sup 231/Th. ...
Polyalumino- carbosilane. Polyborodiphenylsiloxane. (Reaction Accelerator). Dechlorination. Polymerization. NaCl. Aluminum (III) acetylacetonate ...
... partly on the results of the screening studies, adsorption measurements of three chelating agents, diphenylphosphinic acid, acetylacetone and 8 ...
for red iridium III bis 2- 9,9-dibutylfluorenyl -1-isoquinoline acetylacetonate DFIr and red iridium III bis 2- 2-benzo-thienyl pyridinatoN,C3 acetyl-acetonate BtpIr dopants. Although green iridium III tris acetylacetonate DFIr , and iridium III bis 2- 2-benzo-thienyl pyridinatoN, C3 acetyl-acetonate Btp
... Vanadyl and vanadium acetylacetonate and vanadyl naphthenate were also evaluated and were ineffective under wet conditions and inferior to ...
... have been prepared by chemical solution deposition with corresponding metal alkoxides partially stabilized with triethanolamine and acetylacetone ...
... for use in promoting the cure of polyurethane propellants composed of zinc oxide as the first component and either acetylacetone, linoleic acid ...
Mar 1, 2011 ... scrubbers containing acetylacetone solutions as scrubbing liquors. Resulting product is easily disposable and expensive liners for ...
