Copper (II) fluoride
Structural formula | ||||||||||
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General | ||||||||||
Surname | Copper (II) fluoride | |||||||||
other names |
Copper difluoride |
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Molecular formula | CuF 2 | |||||||||
Brief description |
White dust |
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External identifiers / databases | ||||||||||
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properties | ||||||||||
Molar mass | 101.54 g mol −1 | |||||||||
Physical state |
firmly |
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density |
4.23 g cm −3 (anhydrous) |
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Melting point |
836 ° C |
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boiling point |
1676 ° C |
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solubility |
slightly soluble in cold water (47 g l −1 at 20 ° C) |
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safety instructions | ||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
Copper (II) fluoride is a chemical compound from the group of fluorides .
Extraction and presentation
Copper (II) fluoride can be obtained by reacting copper (II) chloride with fluorine or copper (II) oxide with hydrogen fluoride at 400 ° C.
properties
Copper (II) fluoride is a white, crystalline, air-sensitive powder that is sparingly soluble in cold water. It is hydrolytically split by hot water. If it is not completely anhydrous, it will turn a pale gray when heated. In the presence of water, a light blue dihydrate forms, which gives off its water of crystallization at temperatures above 130 ° C. The complex anions CuF 3 - , CuF 4 2− and CuF 6 4− are formed with fluoride ions . As a solid, copper (II) fluoride is in a distorted rutile structure . In the melt, it slowly decomposes to give copper (I) fluoride and copper , releasing fluorine .
use
Copper (II) fluoride can be used for the fluorination of aromatic hydrocarbons . However, this requires relatively high temperatures, which makes this reaction impossible for many products.
Similarly, copper (II) fluoride can also be used at high temperatures as a fluorinating agent for inorganic substances, for example for tantalum .
Individual evidence
- ↑ a b c d Georg Brauer (Ed.), With the collaboration of Marianne Baudler a . a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 246.
- ↑ a b c data sheet Copper (II) fluoride, 98% from Sigma-Aldrich , accessed on November 30, 2011 ( PDF ).
- ↑ a b c d David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. CRC Press, 2009, ISBN 978-1-4200-9084-0 .
- ^ A b c A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 .
- ↑ MA Subramanian, LE Manzer: A "Greener" Synthetic Route for Fluoroaromatics via Copper (II) Fluoride . In: Science . 297, No. 5587, 2002, p. 1665. doi : 10.1126 / science.1076397 . PMID 12215637 .