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A series of mono- and oligonuclear vanadium(V) and vanadium(IV) complexes containing various chelating N,O-, N 3 -, and O 2 -ligands have been prepared. The biphasic reaction of an aqueous solution of ammonium vanadate and a dichloromethane solution of hexamethylphosphoramide (hmpa) and pyrazine-2-carboxylic acid (pcaH) or pyrazine-2,5-dicarboxylic acid (pdcaH 2 ) or pyridine-2,5-dicarboxylic...
The compound [Fe 2 (HPTB)(μ-OH)(NO 3 ) 2 ](NO 3 ) 2 .CH 3 OH.2H 2 O (1) containing a dinuclear iron(III) complex in which HPTB=N,N,N',N'-tetrakis(2-benzimidazolylmethyl)-2-hydroxo-1,3-diaminopropane catalyzes the oxidation of alkanes with hydrogen peroxide in acetonitrile solution at room temperature only if certain amino acids (pyrazine-2-carboxylic,...
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