Manganese acetylacetonate, catalyst

It is also possible to load metals into the nanocrystalline magnesium oxide, such that very high dispersions are possible, which serve as an unusual catalyst support. The asymmetric epoxidation (AE) of unfunctionalized olefins to epoxides using manganese acetylacetonate stabilized on NAP-MgO has been described. 

Series Pd-Mn / SiOa catalysts have been prepared from molecular complexes. The precursors, palladium (II) bis-acetylacetonate and manganese (II) bis-acetylacetonate, were purchased fi om STREM Chemicals Inc. 

Oxalic acid Oxalic acid dihydrate catalyst, nylon Manganese acetate (ous) catalyst, olefin isomerization Iron pentacarbonyl catalyst, olefin polymerization Acetylacetone Ammonium lactate Chromium carbonyl Chromium chloride (ic) Ethylacetoacetate... 

Dioctyltin diisooctylthioglycollate catalyst, PU two-pack coatings Dibutyltin bis (laurylmercaptide) catalyst, PU elastomers Ferric acetylacetonate N-Hydroxyethy I pi perazi ne catalyst, purified terephthalic acid polyesters Manganese acetate (ous) catalyst, PVC suspension polymerization Lauroyl peroxide catalyst, pyridine synthesis Cobaltocene... 

The acetylacetonate complexes of cobalt(II) and manganese(111) are efficient catalysts for the thermally intiated oxidation of tetralin, but do not influence the photoinitiated process. The reverse situation is observed for the iron(III) and cobalt(III) complexes [70a]. The thermal oxidation can be influenced by the addition of free-radical initiators like t-butyl hydroperoxide or 2,2 -azobisisobutyronitrile [70b]. 

Niobium (V) chloride (10mol%) can efficiently catalyze the acetylation of 4-me-thoxybenzyl alcohol (175) with acetic anhydride at room temperature to give the corresponding acetate (176) in 96% yield (Scheme 16.51) [61]. Secondary, tertiary, phenol, as well as Baylis-Hillmann alcohol sensitive toward Lewis acids, are readily to be acetylated (Scheme 16.52). Manganese(III) acetylacetonate derivatives also proved to be effective catalysts for alcohols, amides, and phenols with acetic anhydride [62]. 

The trimerization reaction of the polyfunctional cyanates is catalyzed by zinc or manganese octoate, copper carboxylates, and acetylacetonate metal chelates with a synergistic effect when the catalyst is mixed with 4-nonylphenol [21]. The final cure or postcure temperature depends on the glass transition temperature of the tridimensional network. This means that the semi-solid biscyanate 88 is cured at 180-195 C (Tg 192°C) while the biscyanate 85 is cured at 250-300°C (Tg 290°C). However, the maximum cure temperature can be reduced to 120°C in the former example by adding 6-10% of 4-nonylphenol. When compared to epoxies, cyanate esters have higher glass transition temperatures, better thermal stability, and improved dielectric properties. Cyanate esters have been primarily developed... 

---