Acetylacetonates and Metal Acetylacetonates

acetylacetonates are a group of coordination complexes derived from the acetylacetonate anion and metal ions. Typically both oxygen atoms bind to the metal to form a six-membered chelate ring. They are a class of chemical compounds that have been extensively studied in many areas of science and technology, including organic synthesis, catalyst precursors, and catalysis reagents.

Acetyl acetone is an important building block in sulphonamide based chemicals, bactericides, and pesticides. It is also a solvent for Cellulose Acetate, an extraction solvent for mineral processing, and a stabilizing agent for PVC & Polyesters, Fragrances, Biomolecules, and Dyes & Pigments.

Metal acetylacetonates are coordination complexes formed from the acetylacetonate ligand and metal ions, usually transition metals. Typical acetylacetonates include Mn(acac)3 (Cyclohexyl manganese), VO(acac)2 (Vanadium), Fe(acac)3 (Fedium), and Co(acac)3 (Cobalt).

In addition to its use as a ligand in these compounds, acetylacetone has been shown to participate in electron beam induced deposition. These reactions have been investigated both in condensed layers and in the gas phase using X-ray photoelectron spectroscopy.

The results showed that a metal acetylacetonate can be prepared from an Electron-Transfer reaction between a metal in a higher oxidation state and acetylacetonate. In most cases this requires a metal halide or hydroxide as a source of the metal ion. The advantages of this technique are the relatively high purity, solubility in organic solvents, and the lack of contamination by chloride or alkyne oxide.

Thermo-oxidative aging studies of chloroprene rubber (CR) filled with carbon black and silica were carried out to study the influence of curing systems containing Mn(acac)3 or Ni(acac)3 on the vulcanization process. It was found that the proposed curing system containing Mn(acac)3 and Ni(acac)3 exhibited excellent crosslinking characteristics and aging resistance.

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