Cerium acetates

Oxidation of alkenes to glycol mono- and diacetates has also been reported to proceed with oxygen in acetic acid in the presence of catalytic amounts of cerium acetate 224b It is reasonable to assume that reoxidation of Ce(III) to Ce(IV) is a vital step in the catalytic cycle after electron transfer [cf. Eqs. (140)1. 

The use of mild oxidizing agents or operation under mild conditions usually results in products other than anthraquinone from the oxidation of anthracene. Tints, oxidation with tin oxide, manganese oxide, cerium acetate, or vanadium pentoxide in glacial acetic add results in the formation of a mixture of acetates.258 ... 

Acetic acid, cerium(3+) salt Cerium acetate Cerium triacetate Cerium(3+) acetate Cerium(lll) acetate Cerous acetate EINECS 208-654-0. 

Selective complexation of di- and tetra-substituted porphyrins with cerium(III) ion led to novel double- and triple-decker sandwich complexes. In such complexes, the two or three porphyrin macrocyles were rotated by ca. 20-45. The various complexes were prepared by reaction of the parent porphyrins with cerium acetate. 

Ano er line of research that is arousing great interest in this area of research is the incorporation of corrosion inhibitors capable of playing an active role in protecting against corrosion similar to that of Cr +. Thus, studies are to be found that incorporate a wide variety of compounds such as cerium acetate, cerium oxalate, calcium borate, potassium metavanadate and cerium vanadate. 

In a recent paper, Moutarlier et al. [15] have claimed that the use of cerium salts in sol-gel-based corrosion protection is limited due to the high solubility of the cerium ions. In all of the papers cited here, the authors limited themselves to the use of cerium chloride or cerium nitrate. In order to examine the influence of alternative anions, in the present study, cerium sulphate, cerium acetate hydrate (cerium Ac) and cerium acetylacetonate (cerium Acac) have been compared to cerium nitrate and cerium chloride. Additionally, attempts were made to limit the solubility of cerium chloride and cerium nitrate with the addition of acetylacetone to form complexes of the cerium ions. Table 10.1 gives the solubilities of the cerium compounds examined in this study. 

The cerium compounds used for these experiments were cerium acetylacetonate (cerium Acac), cerium nitrate hexahydrate (cerium nitrate), cerium chloride heptahy-drate (cerium chloride), cerium acetate hydrate (cerium Ac) and cerium sulphate. Additionally, cerium nitrate and cerium chloride were dissolved in ethanol and mixed... 

A— 4 wt.% cerium nitrate —A— 4 wt.% cerium nitrate acac - t> 4 wt.% cerium chioride -->--4 wt.% cerium chioride acac 4 wt.% cerium sulphate — —4 wt.% cerium acetylacetonate —4 wt.% cerium acetate... 

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