Beryllium complex compounds

Beryllium butyrate, basic, properties and structure of, 3 7, 8 Beryllium carbonate, basic, for use in preparation of basic beryllium acetate, 3 10 Beryllium chloride, anhydrous, 6 22 Beryllium o-chlorobenzoate, basic, properties of, 3 7 Beryllium complex compounds, basic, of organic acids, 3 4 basic, structure of, 3 6 nonelectrolytes, with acetylace-tone, Be(CsH702)2, 2 17 with benzoylacetone, Be(Cio-H 02)2, 2 19... 

Four-membered heterocycles exist in the structures of dimeric di-/-butylarsino zinc complex 32 and in the related gallium compound 33.191,192 In contrast, the di-/-butylarsino beryllium complex BuSAs-BcCp 34 is monomeric.193... 

The zinc compound 1 begins to decompose at 10°C to zinc and hydrocarbons, but the magnesium and beryllium complexes are more stable. Crystalline adducts 2 can be isolated on addition of TMEDA. The 1H-NMR spectra of 2 (M = Mg, Zn) show averaged AB2X patterns on account of rapid fluxional processes. The spectra can be frozen out at low temperatures, indicating terminally bonded r l-pentadienyl groups (85-87). 

In the Group 2 derivatives, less diversity is found the beryllium complex is monomeric, probably for steric reasons, but the Mg-Ba compounds are dimers. Although the M—Si... 

I herc is also an interesting series of basic beryllium complexes with the carboxylic acids which are covalent compounds of remarkable stability. Basic beryllium acetate, Be40(00C.CH3)g melts at 283°, boils at 330° without decomposition and dissolves in CHCI3 as the monomer it lacks ionic properties. Its structure has a central O atom surrounded tetrahedrally by tour... 

The hydrides are excellent fuels on an energy basis. Lithium and beryllium hydrides are very good fuels but both are solids and both produce solid oxides. All beryllium compounds ate very toxic. The hydrides of boron and carbon form many complex compounds containing multiple atoms of both boron... 

Metal complexes have a variety of stractures. Silver complexes are often linear beryllium complexes are usually tetrahedral iron forms a carbonyl compound that has a trigonal bipyramidal structure cobalt(lll) complexes are octahedral and tantalum forms an eight-coordinated fluoride complex (Figure 3.1). Although a variety of coordination numbers and structures have been observed in metal complexes, the only common coordination numbers are four and six the common structures corresponding to these coordination numbers are tetrahedral and square planar, and octahedral, respectively. In studying metal complexes, it soon becomes clear that the octahedral structure is by far the most common of these configurations. 

Richard M. Klein and J. C. Bailar, Jr., Reactions of Coordination Compounds. Polymers from 3-Substituted Bis-( -diketone)-beryllium Complexes, Inorg. Chem. 2 1190(1963). 

Inclusion compounds of the Cg aromatic compounds with tris((9-phenylenedioxy)cyclotriphosphazene have been used to separate the individual isomers (43—47). The Schardinger dextrins, such as alpha-cyclodextrin, beta-dextrin, and gamma-dextrin are used for clathration alpha-dextrin is particularly useful for recovering PX from a Cg aromatic mixture (48,49). PyromeUitic dianhydride (50) and beryllium oxybenzoate (51) also form complexes, and procedures for separations were developed. 

Beryllium, calcium, boron, and aluminum act in a similar manner. Malonic acid is made from monochloroacetic acid by reaction with potassium cyanide followed by hydrolysis. The acid and the intermediate cyanoacetic acid are used for the synthesis of polymethine dyes, synthetic caffeine, and for the manufacture of diethyl malonate, which is used in the synthesis of barbiturates. Most metals dissolve in aqueous potassium cyanide solutions in the presence of oxygen to form complex cyanides (see Coordination compounds). 

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