2,4-Pentanedione properties

Penta.nedione, 2,4-Pentanedione [123-54-6] (acetylacetone) is the lowest member of the aUphatic 1,3-diketones and is a colorless Hquid with a mild ketone-like odor. It is completely miscible with organic solvents other physical properties ate shown in Table 1. 

E Kawagoshi Y, Eujita M (1998) Purification and properties of the polyvinyl alcohol-degrading enzyme 2,4-pentanedione hydrolase obtained from Pseudomonas vesicularis var. povalolyticus PH. World J Microbiol Biotechnoi 14 95-100... 

Much of the chemistry of 1,3-dialdehydes, aldehyde ketones, and diketones already has been mentioned in this chapter and is well illustrated in the properties of 2,4-pentanedione,... 

Tellurium 3-ethyl-n-butyrylacetone (2 4-Diethylcyclotelluro-pentanedione), when crystallised successively from water and petroleum, separates as yellow needles sintering at 110° C. and melting with blackening at 113° C. Its aqueous solution is very stable on boiling, but devoid of enolie or acidic properties. 

EXPERIMENT 9.2 INVESTIGATING SOLVATOCHROMATIC PROPERTIES OF VANADYL-d/s(2,4-PENTANEDIONE), VO(acac)2 USING VISIBLE SPECTROSCOPY... 

The crude dione could be purified at this stage by Kugelrohr distillation (oven temp. 80°C at 1 mm) to give the 1,5-dichloro-2,4-pentanedione as a clear, colorless oil. The enol.keto ratio is ca. 5.7 1. The physical properties are as follows ... 

A re-investigation of the reaction showed, in accordance with VotoCek s hypothesis, that the compounds obtained have properties (for example, color reactions, ultraviolet and infrared spectra, hydrolysis when examined chromatographically) similar to those of the /3-(glycosylamino) a, 8-un-saturated esters or ketones prepared directly from glycosylamines and i3-dicarbonyl compounds. The derivatives from L-rhamnose and ammonia with ethyl acetoacetate and with 2,4-pentanedione are, indeed, identical... 

Structural and Catalytic Properties of Amorphous Mesoporous AIPO4 Materials Prepared in the Presence of 2,4-Pentanedione and 2,5-Hexanedione as Aluminium Chelating Agents... 

Aluminum, tris (2,4-pentanedionato)- Aluminum, tris (2,4-pentanedionato-0,0 )- Tris (acetylacetonate) aluminum Tris (acetylacetonate) aluminum (III) Tris (acetylacetone) aluminum Tris (acetylacetonyl) aluminum Tris (2,4-pentanedionato) aluminum Tris (2,4-pentanedione) aluminum Definition Aluminum complex of acetylacetone Empiricai C15H21AIO6 Properties Wh. to yel. powd. orcryst. m.w. 

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