Complexation of tetrafluoroboric acid with benzo-15-crown-5

The extraction of tetrafluoroboric acid from aqueous solutions to a solution of benzo-15-crown-5 (B15С5, 1 mol L -1 ) in chloroform is shown to occur due to complexation with the ratio of components HBF 4 : B15С5 = 1: 1.5. It was revealed by IR spectroscopy that the whole crown ether in the extract...

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Bibliographic Details
Published in:Russian chemical bulletin 2018-12, Vol.67 (12), p.2191-2194
Main Authors: Zhilov, V. I., Kostikova, G. V., Kuz´mina, L. G., Demina, L. I., Demin, S. V., Tsivadze, A. Yu
Format: Article
Language:English
Subjects:
AQUEOUS SOLUTIONS
ATOMS
BORON 15
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
CHLOROFORM
Complexation
COMPLEXES
CROWN ETHERS
EXTRACTION
FLUOROBORIC ACID
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INFRARED SPECTRA
Infrared spectroscopy
Inorganic Chemistry
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
Organic Chemistry
Spectrum analysis
X-RAY DIFFRACTION
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Summary:The extraction of tetrafluoroboric acid from aqueous solutions to a solution of benzo-15-crown-5 (B15С5, 1 mol L -1 ) in chloroform is shown to occur due to complexation with the ratio of components HBF 4 : B15С5 = 1: 1.5. It was revealed by IR spectroscopy that the whole crown ether in the extract is coordinated. The 1: 1 HBF 4 •В15С5 complex was isolated and characterized using IR spectroscopy and X-ray diffraction analysis. The O(2) and O(4) atoms of the crown ether ring participate in the coordination.
ISSN:1066-5285
1573-9171
DOI:10.1007/s11172-018-2354-6