Copper complexes acetyl acetonate

The acetylacetonates are stable in air and readily soluble in organic solvents. From this standpoint, they have the advantage over the alkyls and other alkoxides, which, with the exception of the iron alkoxides, are not as easily soluble. They can be readily synthesized in the laboratory. Many are used extensively as catalysts and are readily available. They are also used in CVD in the deposition of metals such as iridium, scandium and rhenium and of compounds, such as the yttrium-barium-copper oxide complexes, used as superconductors. 1 1 PI Commercially available acetyl-acetonates are shown in Table 4.2. 

Compared to salts, acetyl acetonates offer better solubility in organic solvents and better stability to hydrolysis. They are likely to be less reactive than salts, because complexes of either iron or copper in their highest oxidation state with acetyl acetone are more stabile than at the lower oxidation state. 

Table 1 (48a,b) shows the 24 hr results of the test described above on phenylbutazone. Copper degraded phenylbutazone both as a salt and as acetyl acetonate. Iron was less aggressive, and the free salt was stronger than the complex. The degradation products were 4-hydroxy- and 4-hydroperoxy-phenylbutazone, the known oxidation impurities. The susceptibility of phenylbutazone to metal oxidation can be attributed to activation of the hydrogen on C-4 by the adjacent carbonyls. Selegiline hydrochloride, a stable compound, was not oxidized under the same conditions. This confirms the discriminating power of the experimental conditions. 

Cholesterol Nonanoate h 221-2027 Copper Acetyl Acetonate Complex ... 

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