SYNTHESIS AND CHARACTERIZATION OF NEW KEGGIN-BASED STRUCTURE TUNGSTOCOBALTATES - K-9[CO3+W11O39] AND ITS VANADIUM DERIVATIVES, K-8[CO2+W11V4+O40], K-7[CO2+W11V5+O40], AND K-6[CO3+W11V5+O40]

Good yield synthesis of the potassium salts of four new interrelated polyoxometalates, [Co3+W11O39](9-) (I), [Co2+W11V4+O40](8-) (II), [Co2+W11V5+O40](7-) (III), and [Co3+W11V5+O40](6-) (IV), are reported. The title compounds have been characterized by IR and UV-Vis.-NIR spectroscopies, cyclic volta...

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Published inSynthesis and reactivity in inorganic and metal-organic chemistry Vol. 25; no. 6; pp. 869 - 882
Main Authors BASSERRA, J, TODORUT, CASANPASTOR, N, SERVERCARRIO, J, BAKER, LCW, ACERETE, R
Format Journal Article
LanguageEnglish
Published NEW YORK Marcel Dekker Inc 01.07.1995
Subjects
Chemistry
Chemistry, Inorganic & Nuclear
Physical Sciences
Science & Technology
SPECTRA
SPINS
HETEROPOLY COMPLEXES
PAIRS
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Summary:Good yield synthesis of the potassium salts of four new interrelated polyoxometalates, [Co3+W11O39](9-) (I), [Co2+W11V4+O40](8-) (II), [Co2+W11V5+O40](7-) (III), and [Co3+W11V5+O40](6-) (IV), are reported. The title compounds have been characterized by IR and UV-Vis.-NIR spectroscopies, cyclic voltammetry and magnetic measurements. IR spectra confirm that I has the lacunary structure of an undecatungstate anion, while II through IV have a substituted alpha-keggin structure with the vanadium atom located at an octahedral site replacing one tungsten atom. Optical data confirm the oxidation states for both, the Co and V atoms, as formulated for I through IV.
ISSN:0094-5714
DOI:10.1080/15533179508218267