Aluminum (III) acetylacetonate

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Structural formula
Structural formula of aluminum acetylacetonate
General
Surname Aluminum (III) acetylacetonate
other names
  • Tris (acetylacetonato) aluminum
  • Tris (pentane-2,4-dionato- O , O ′) aluminum
Molecular formula C 15 H 21 AlO 6
Brief description

white-yellowish powder

External identifiers / databases
CAS number 13963-57-0
EC number 237-741-6
ECHA InfoCard 100.034.296
PubChem 16683006
Wikidata Q15410225
properties
Molar mass 324.30 g mol −1
Physical state

firmly

density

1.21 g cm −3 (20 ° C)

Melting point

190-193 ° C

boiling point

315 ° C

solubility

sparingly soluble in water (3 g l −1 at 20 ° C)

safety instructions
GHS labeling of hazardous substances
06 - Toxic or very toxic

danger

H and P phrases H: 300-315-319-335
P: 261-264-280-301 + 310-305 + 351 + 338
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Aluminum (III) acetylacetonate , Al (acac) 3 , is a chemical compound from the group of metal acetylacetonates. It is a complex compound with an aluminum (III) cation as the central ion and the anion acetylacetonate as the bidentate chelate ligand .

Extraction and presentation

Aluminum (III) acetylacetonate was first produced by Combes in 1887 by reacting fresh aluminum oxide, acetylacetone and hydrochloric acid. It can be produced in higher yields in the laboratory through the reaction of aluminum sulfate with acetylacetone and ammonia .

Aluminum (III) acetylacetonate

properties

Aluminum (III) acetylacetonate is a white-yellowish, crystalline powder. It is difficult in water, but readily soluble in various organic solvents and resistant to air and ammonia. Aluminum (III) acetylacetonate has an octahedral structure. This chelate complex is a chiral compound.

In a vacuum (1 mm Hg or 1.3 mbar) it can be slowly sublimated at 100 ° C and well at 156 ° C.

For further purification, it can be dissolved in benzene and precipitated again from this with the addition of petroleum ether.

use

Aluminum (III) acetylacetonate can be used, among other things, in the production of aluminum oxide at low temperatures (approx. 200 ° C).

Related links

Individual evidence

  1. ↑ a b c d e f g Entry on aluminum acetylacetonate in the GESTIS substance database of the IFA , accessed on September 19, 2017(JavaScript required) .
  2. ↑ a b c d Ralph C. Young: Aluminum Acetylacetonate . In: WC Frenelius (Ed.): Inorganic Syntheses . tape 2 . McGraw-Hill, Inc., 1946, p. 25-26 (English).
  3. ^ Robert A. Chalmers, Mohammad Umar: Secondary standards: Acetylacetonates . In: Analytica Chimica Acta . tape 42 , 1968, pp. 357-364 , doi : 10.1016 / s0003-2670 (01) 80326-3 .
  4. ↑ a b Manisha Shirodker; Vrinda Borker; C. Nather; W. Bensch; KS Rane: Synthesis and structure of tris (acetylacetonato) aluminum (III) . In: Indian Journal of Chemistry . tape 49 , no. 12 , 2010, p. 1607-1611 ( res.in ).
  5. ↑ Entry on metal acetylacetonate. In: Römpp Online . Georg Thieme Verlag, accessed on January 2, 2018.