Aluminum acetylacetonate

A small excess of acetylacetone is added to an aqueous solution of A1(N03)3. Then a dilute solution of NH OH is added very slowly. This procedure gives pure A1 acetylacetonate in quantitative yield. 

Anhydrous AICI3 is dissolved in chloroform, and a slight excess of acetylacetone is added. 

Brilliant plaques or prisms, similar to mother of pearl. M.p. 192-194°C. Sublimes at 140°C (10 mm.), d (20°C) 1.27. Decomposes when heated in air. Insoluble in water slightly soluble in alcohol, ether and benzene. Can be recrystallized from acetone. 

The cup formed at the electrode end of the U tube is 3 cm. in diameter and very shallow nevertheless, it can hold more than 10 g. of molten Ga. As a result of the heat produced by the high resistance of the cell, the Ga separates as the liquid. Because the Ga is in contact with the cathode during operation, it is also cathodic. Hence it can be readily washed, dried and weighed directly in the cup. This arrangement therefore permits quantitative work. 

Before loading the cell the Ga is first precipitated as the hydroxide, using no more than the equivalent of 10 g. of the metal. It is then dissolved in the minimum volume of concentrated NaOH and diluted with HgO to 150 ml. With a current of 1 amp. (3-4 v.), 6 g. (of the 10) is obtained during the first 24 hours in the next 24 hours 3.5 g. more separates. The remaining 0.5 g. separates so slowly, however, that it is expedient to precipitate it with sodium hydroxide and to use it in the next electrolysis. 

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Kowalski A, Libiszowski J, Majerska K, Duda A, Penczek S (2007) Kinetics and mechanism of E-caprolactone and LJ--lactide polymerization coinitiated with zinc octoate or aluminum acetylacetonate The next proofs for the general alkoxide mechanism and synthetic applications. Polymer 48 3952-3960... 

Aluminum acetylacetonate [13963-57-0] M 324.3, m 192-194 , 195 . Crystd several times from... 

Zatta P, Favarato M, Nicolini M. 1993. Deposition of aluminum in brain tissues of rats exposed to inhalation of aluminum acetylacetonate. NeuroReport 4 1119-1122. 

Aluminum acetylacetonate, 2 25 Aluminum bromide, 3 30 of high purity, 3 33 Aluminum chloride, compound with selenium(IV) chloride, 5 127 Aluminum complex compounds, anions, oxalato, K3[A1(Cs04)3]-3HsO, 1 36... 

FIGURE 16. Gaseous decomposition products from aluminum acetylacetonate as a function of the temperature of pyrolysis °. Reprinted with permission from Reference 220. Copyright 1958 American Chemical Society... 

Another example of geometrical hindrance acting on the cr,77-conjugation is the chelated metal acetylacetonates. We [together with Kursanov, Smolina, and Fames 125)] showed that, unlike acetylacetone, cobalt (III) or aluminum acetylacetonates did not exchange their protons for deuterium with DjO in dioxane. 

When a drug or a non-active incorporated ingredient has plasticizing property, a further increase of cohesion with crosslinking of polymers is also a necessary approach. Practically, ionic crosslinkers such as aluminum acetylacetonate and chemical crosslinkers such as polyfunctional isocyanate are commonly used. The cross-linking occurs at the site of carboxyl groups or hydroxyl groups on the polymer side chain that may recover the cohesion of the adhesive. 

The solvents most frequently mentioned as dissolving the metal acetylacetonates are benzene, ethanol, chloroform, carbon tetrachloride, carbon disulfide, and petroleum ether. Since the solubility in petroleum ether is much less than in benzene, the former is frequently added to a saturated solution in the latter to effect crystallization. Hatch and Sutherland13 give data on the solubilities of sodium, potassium, magnesium, beryllium, and aluminum acetylacetonates in benzene, cyclohexane, and n-hexane from 0 to 100°. Other solubility measurements are as follows copper(II) acetylacetonate, 0.00338 mol/1. in benzene at 25° 57 zirconium acetylacetonate, 200, 34, 47, and 56 g./l. in absolute ethanol, carbon disulfide, carbon tetrachloride, and acetylacetone, respectively, at 25°.4 Recent data by Blanch58 are assembled in the following table. 

Aluminum acetylacetonate was first prepared by Combes by treatment of a mixture of hydrous aluminum oxide and acetylacetone with hydrochloric acid. Gach made the compound by the action of aluminum amalgam on acetylacetone, while Urbain and Debierne used anhydrous aluminum chloride and acetylacetone. The recommended procedure was first described by Biltz. ... 

A solution of freshly distilled acetylacetone is prepared by adding 6 N ammonia dropwise, with stirring, to a suspension of 6 g. of the oil in 40 ml. of water until complete solution has been effected. This solution is added to a solution of 6 g. of aluminum sulfate, Al2(S04)3T7Hz0, in 60 ml. of water. The mixture of the two solutions should be neutral to htmus. Aluminum acetylacetonate precipitates immediately in practically theoretical yield. The precipitate is filtered, washed with water, and air-dried. For purification the product is first subhmed at a pressure of 1 mm. or lower (see synthesis 5) at about 156° (vapor of boiling bromobenzene). The subhmate is dissolved in the least possible quantity of benzene, and the pure acetylacetonate is then precipitated by the addition of petroleum ether. After the precipitate is filtered by suction, it is washed with petroleum ether and air-dried. For many purposes the subhmation may be omitted. Yield 4.2 g. (81 per cent). 

Aluminum acetylacetonate (m.p. 194.6° b.p. 314 to 315.6°) is insoluble in water but soluble iu organic solvents. It is monomolecular both in carbon disulfide and in the vapor state. The compound reacts with alkalies, with acids, and with water at elevated temperatures. The crystal structure has been studied by Sarkar and the electrical polarization by Sutton and coworkers. In a vacuum of 1 mm., subhmation occurs very slowly at 100° but rapidly at 156°. 

Aluminum 2,4-pentanedioate. See Aluminum acetylacetonate Aluminum phenolsulfonate CAS 1300-35-2 EINECS/ELINCS 215-083-0 Synonyms Aluminum sulfocarbolate Aluminum tris (hydroxybenzenesulfonate) Benzenesulfonic acid, hydroxy-, aluminum salt Hydroxybenzenesulfonic acid, aluminum salt... 

Tris. See Tris (hydroxymethyl) aminomethane Tris acetate. See Tris (hydroxymethyl) aminomethane acetate Tris (acetylacetonato) aluminum Tris (acetylacetonato) aluminum (III). See Aluminum acetylacetonate Tris (acetylacetonato) chromium (III). See Chromic acetylacetonate Tris (acetylacetonato) vanadium Tris (acetylacetonato) vanadium (III). See Vanadium tris acetyl acetonate Tris (acetylacetone) aluminum Tris (acetylacetonyl) aluminum. See Aluminum acetylacetonate... 

Aluminum acetylacetonate Chromic acetylacetonate Cobalt acetate (ous) Cobalt acetylacetonate Dicyandiamide Diethylaminoethyl acrylate Ferric acetylacetonate Magnesium acetylacetonate Manganese acetylacetonate Methyl morpholine oxide... 

Chromium sulfate (ic) crosslinking agent Acrylic acid/acrylamide copolymer Allylglycidyl ether alcohol resin Allyl isocyanate Aluminum acetylacetonate N-2-Aminoethyl-3-aminopropyl trimethoxysilane Ammonium persulfate t-Amyl peroxyacetate Bis (triethoxysilyl) ethane Chromic acetylacetonate Cobalt acetate (ous). 

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