Author:
Drátovský Milan,Havlíček David
Abstract
The acid-base reaction between Na2MoO4 + Na4As2O7 as Lux bases dissolved in an NaNO3 + KNO3 melt and an NO2 + O2 gas mixture as a Lux acid gave a novel heteropolyacid salt whose composition is approximately (Na, K)18As2Mo17O65, (Na, K)16As2Mo18O56, (Na, K)16As2Mo17O64. This compound can also be obtained by direct fusion of the components (Na4As2O7, Na2MoO4 and MoO3) over the temperature region of 420-600 °C. Based on the study of the arsenate and diarsenate ions in a nitrate melt and the molecular spectra of the compound obtained it is suggested that the basic unit of the heteropolyanion structure is the diarsenate anion. The formation of analogous compounds can generally be expected for X/Z combinations with X = P(V), As(V), V(V) and Z = Mo(VI), W(VI).
Publisher
Institute of Organic Chemistry & Biochemistry
Cited by
6 articles.
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