Beryllium oxide acetate

SYNS BERYLLIUM ACETATE, BASIC BERYLLIUM OXIDE ACETATE HEXAKIS( -ACETATO-0 OVn -OXOTETRABERYIXIUM HEXAKIS(H-ACETATO)-n -OXOTETRABERYLLIUM... 

C12H1604 2,2-dimethyl-3-hydroxy-3-(p-methoxyphenyl)pr 64284-35-1 486.15 42.555 2 24390 C12Hlfi8 40l3 beryllium oxide acetate 19049-40-2 604.15 53.976 1,2... 

Basic beryllium acetate, [CAS 543-81-7], Be40(C2lL02)6, is the best known of the beryllium salts of organic adds which can be divided into normal beryllium carboxylates, Be(RCOOh. and beryllium oxide carhoxylates, Re40(RC.00). The basic aceiate is soluble in glacial acetic acid and can readily be crystallized therefrom in very pure form. It is also soluble in chloroform and other organic solvents. It has been used as a source of pure beryllium salts,... 

The ethereal solutions of these iodides do not fume in air, and removal of the solvent gives a liquid, which on further heating evolves dense white fumes, probably of beryllium oxide. Heating changes the alkyl beryllium halides to beryllium dialkyls. All the alkyl halide compounds are decomposed by water, with formation of the corresponding hydrocarbon. When carbon dioxide is passed through ethereal beryllium methyl iodide for three hours, the solution still gives a positive test and no acetic acid is found after hydrolysis. Acetanilide is formed from beryllium methyl iodide and phenyl isocyanate. 

Stable for several weeks in a closed vessel at room temperature. Slowly splits off acetic anhydride (rapidly when heated) and is converted to basic beryllium acetate, which sublimes. Undergoes partial decomposition to acetic anhydride and beryllium oxide when heated rapidly. 

A different situation obtains in compounds such as the basic beryllium monocarboxylates (140-142). In particular the acetate derivative, Be40(02CCH3)6, has been known in the solid state for nearly 100 years (143). A partial structure of this compound is in Fig. 13 (144). The central oxide ion is surrounded by a tetrahedron of beryllium atoms. The acetate ions form bridges across the six edges of the Be4 tetrahedron, with each acetate bonding with two Be atoms. Each berylium atom in surrounded by an approximate tetrahedron of... 

BERYLLIUM DIFLUORIDE (7787-49-7) Mixtures with water form an acid solution. Incompatible with acids, caustics, chlorinated hydrocarbons, oxidizers, molten lithium, magnesium. Aqueous solution is incompatible with organic anhydrides, acrylates, alcohols, aldehydes, alkylene oxides, substituted allyls, cresols, caprolactam solution, epichlorohydrin, ethylene dichloride, glycols, isocyanates, ketones, maleic anhydride, nitrates, nitromethane, phenols, vinyl acetate. 

Particulate matter in a measured volume of air can be collected on a cellulose-acetate-membrane filter (e.g., Millipore ). The filter is dry ashed in a low-temperature asher. (This device uses oxygen radicals in a radio-frequency plasma for ashing at below 100°C, thus minimizing losses due to volatility of the test element and retention on crucible walls.) The ash is taken up in dilute HCl and aspirated directly, or the filter can be digested with a mixture of nitric and perchloric acids. For beryllium determination, a nitrous oxide-acetylene flame is used. Results are reported as Mg/m of air. 

---