Study of acid pyridine-3-carboxylic acid dodecatungstenphosphate of the composition (C6NO2H5)2H[PW12O40]·2H2O

Study of acid pyridine-3-carboxylic acid dodecatungstenphosphate of the composition (C6NO2H5)2H[PW12O40]·2H2O

Acid pyridine-3-carboxylic acid dodecatungstenphosphate (C 6 NO 2 H 5 ) 2 H[PW 12 O 40 ]·2H 2 O is synthesized. The compound is studied by chemical analysis, IR spectroscopy, X-ray crystallography, and thermogravimetry. The compound is found to crystallize at 290 K in a hexagonal crystal system (spa...

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Bibliographic Details
Published in:Journal of structural chemistry Vol. 55; no. 4; pp. 674 - 681
Main Authors: Kaziev, G. Z., Kirichenko, O. A., Stash, A. I., Quinones, Saul H., Solov’eva, E. A., Chen, Y. S.
Format: Journal Article
Language:English
Published: Moscow Pleiades Publishing 2014
Subjects:
Atomic
Atomic/Molecular Structure and Spectra
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Molecular
Optical and Plasma Physics
Physical Chemistry
Solid State Physics
X-ray crystallography
physicochemical properties
heteropolycompounds
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Summary:Acid pyridine-3-carboxylic acid dodecatungstenphosphate (C 6 NO 2 H 5 ) 2 H[PW 12 O 40 ]·2H 2 O is synthesized. The compound is studied by chemical analysis, IR spectroscopy, X-ray crystallography, and thermogravimetry. The compound is found to crystallize at 290 K in a hexagonal crystal system (space group ) ( I ) with the unit cell parameters: a = 33.015(6) Å, c = 12.010(2) Å, γ = 120°, V = 11337(4) Å 3 , Z = 9. When the temperature decreases to 100 K, a phase transition is observed leading to an increase in symmetry to ( II ), with the unit cell parameters: a = 33.072(1) Å, c = 24.234(1) Å, γ = 120°, V = 22955(2) Å 3 , Z = 18.
ISSN:0022-4766
1573-8779
DOI:10.1134/S002247661404012X