Beryllium acetate complexes

Beryllates, tetrachloro-alkali metal complexes, 10 Beryllium acetate complexes, 8 Beryllium borohydride ammine complexes, 8 Beryllium carboxylates basic, 31... 

The zinc complex formed with V,V -diphenylformamidinate is structurally analogous to the basic zinc acetate structure, as [Zn4(/i4-0)L6], and the basic beryllium acetate structure. It is prepared by hydrolysis of zinc bis(diphenylformamidinate).184 Mixed metal zinc lithium species were assembled from dimethyl zinc, t-butyl lithium, V.iV -diphenylbenzamidine and molecular oxygen. The amidinate compounds formed are dependent on the solvent and conditions. Zn2Li2 and... 

Beryllium acetate has been found to give complexes of the type Be(OAc)2-2L with ammonia and primary amines, and beryllium borohydride forms 1 1 complexes with primary amines.101 IR studies on the complex Be(C104)2-2H20 show it to be in the form [Be(H20)4]2+[Be(C104)4]2 at elevated temperatures Be40(C104)6 is formed from the dihydrate.102... 

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... 

Diethylzinc reacts with dimethyltriazene to afford the moisture-sensitive complex Zn(MeNNNMe)2 (17). However, a similar reaction involving diphenyltriazene gave a product which, after recrystallization from dry benzene, was found to be Zn40(PhNNNPh)g and to possess a basic beryllium acetate type of structure (48). 

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... 

A corresponding reaction of acetate ion with AJP is also catalyzed by a bivalent metal ion. The reaction probably results in the formation of an acyl phosphate, which has not been identified as such but has been identified by trapping of the product with hydroxylamine. The best catalyst is beryllium ion, which catalyzes optimally at molar ratios of 1 to 1 or less. Acetate ion is presumably the reactive species, since the pH optimum of the reaction is 5. It is concluded from the pH effects in this study and in the transphosphorylation reaction that a complex of the metal ion and nucleophile must occur. Since acetate ion is a monodentate ligand, the mechanism postulated for the phosphorylation reaction above cannot be completely applicable to this case (36). 

The metal ion specificity for the reaction with acetate was different from that in the reaction with phosphate in the former beryllium was most active, followed by nickel. The alkaline earths that were so effective with phosphate did not catalyze the reaction with acetate at all. The difference in metal specificity in the two reactions was explained by assuming that complexation with the orthophosphate and acetate constitutes an important function in the reaction. 

Beryllium has been determined [764] in non saline waters and in sea water at oceanic levels of 2.30pM. Two ml of 0.1M EDTA, 2ml of 1.0M sodium acetate, 1.0ml of benzene and lOOpl of l,l,l-trifluoro-2-4-pentanedione were added sequentially to 150ml samples. Following liquid-liquid extraction using detailed handling procedures, the organic phase was mixed with 1.0ml of 1.0M sodium hydroxide (de-emulsifier), washed several times with distilled water and the resultant beryllium l,l,l-trifluoro-2,4-pentanedione complex analysed by gas chromatography with electron capture detection. 

Its chelate compounds include acetylacetonc and dioxalato complexes, and a basic acetate, Zn40( H3 00)g, very similar in properties to that of beryllium (p. 263), with a tetrahedral structure centred on the oxygen atom. 

Chrome Azurol S (CAS, formula 4.18) forms a coloured chelate complex with Be, and this has been used for the determination of Be [18-21], In acetate (or hexamine) buffer and in the presence of EDTA as masking agent, the Chrome Azurol S method is highly selective for beryllium. The absorbance of the complex depends on the pH, and on the concentrations of CAS, EDTA, and the acetate buffer. The absorbance increases with increasing CAS concentration, and decreases with increasing EDTA and acetate concentrations. A pH of 5 is the most suitable. Below this pH, the absorbance of CAS increases considerably, and above it the absorbance of the beryllium complex is decreased more by EDTA. 

Speciation of chromium (histidine/acetic acid acetate buffer/EDTA °), mercury (borate/MeOH), tin (pyridine/CTAB), lead (SDS/p-CD), arsenic (borate, phosphate or phosphate/borate, " phosphate/TTAB, phosphate andphosphate/TTAB ), sulfur (phosphate/TTAB/ACN), and selenium (histidine/acetic acid, SDS/p-CD ) by CE methods have been reported. Other examples include the analysis of beryllium (as an acetylacetone complex) in digested airborne dust and the determination of Fe(II)-, Cu(I)-, Ni(ll)-, Pd(II)-, and Pt(II)-cyano complexes and nitrate from leaching solutions of automobile catalytic converters. ... 

Morin, the coloring matter of fustic, is 3,5,7,2, 4 -pentahydroxy flavone (I). Its alcohol solutions react with aluminum salts in neutral or acetic acid solution to give an intense green fluorescence in daylight and ultraviolet light. The fluorescence is due to the formation of a colloidally dispersed inner complex aluminum salt of morin with the probable structure (II), or to an adsorption compound of morin with alumina. Beryllium, indium, gallium, thorium and scandium salts also form fluorescent compounds with morin. The pH of the system has much influence in these reactions. The only metal ion whose reaction with morin is independent of pH is Zr+ or its hydrolysis product (compare page 519). 

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