View source for Copper(II) perchlorate

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| Name = Copper(II) perchlorate
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| IUPACName = Copper(II) perchlorate
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| SystematicName =
| OtherNames = Copper diperchlorate<br>Cupric perchlorate
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| Section1 = {{Chembox Identifiers
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| Section2 = {{Chembox Properties
| AtmosphericOHRateConstant = 
| Appearance = Blue crystalline solid
| BoilingPt = 
| BoilingPtC = 100-102
| BoilingPt_ref = 
| BoilingPt_notes = (decomposes)
| Density = 2.225 g/cm<sup>3</sup> (25 °C)
| Formula = Cu(ClO<sub>4</sub>)<sub>2</sub> (anhydrous)<br>Cu(ClO<sub>4</sub>)<sub>2</sub>·6 H<sub>2</sub>O (hexahydrate)
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| MolarMass = 262.447 g/mol (anhydrous) <br> 370.539 g/mol (hexahydrate)
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| MeltingPtC = 82
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| Odor = Odorless
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| Solubility = 146 g/100 ml (30 °C)
| SolubleOther = Soluble in [[acetic acid]], [[acetone]], [[diethyl ether]], [[ethanol]], [[methanol]]
| Solubility1 = 69 g/100 ml (20 °C)<ref>Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961 (Solubility Handbook. - T.1, Book.1. - M.-L.: IAN USSR, 1961)</ref>
| Solvent1 = furfural
| VaporPressure = ~0 mmHg
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| DeltaHf = -1,915 kJ/mol
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| AutoignitionPt = 
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| ExternalMSDS = [https://www.docdroid.net/m8Jw8hh/copperii-perchlorate-hexahydrate-sa-pdf Sigma-Aldrich] (hexahydrate)
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| MainHazards = Harmful<br>Oxidizer
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| Section7 = {{Chembox Related
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| OtherCompounds = [[Silver perchlorate]]
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'''Copper(II) perchlorate''' is an inorganic chemical compound, a salt of [[copper]] and [[perchloric acid]]. It has the formula '''Cu(ClO<sub>4</sub>)<sub>2</sub>''', though it is more commonly encountered as hexahydrate, '''Cu(ClO<sub>4</sub>)<sub>2</sub>·6 H<sub>2</sub>O'''.

==Properties==
===Chemical===
Copper(II) perchlorate decomposes when heated.

===Physical===
Copper(II) perchlorate is a hygroscopic blueish solid, soluble in water.

==Availability==
Copper(II) perchlorate is sold by chemical suppliers.

==Preparation==
Copper(II) perchlorate can be prepared by dissolving [[copper(II) oxide]] with [[perchloric acid]].<ref>Nagy, L.; Zsikla, L.; Burger, K.; Rockenbauer, A.; Kiss, J. T.; Journal of Crystallographic and Spectroscopic Research; vol. 19; nb. 5; (1989); p. 911 - 918</ref>

: CuO + 2 HClO<sub>4</sub> → Cu(ClO<sub>4</sub>)<sub>2</sub> + H<sub>2</sub>O

Copper metal must not be used as the reaction is claimed to be dangerous.

If perchloric acid is not available but other perchlorate salts are, addition of aq. copper(II) sulfate to aq. [[barium perchlorate]] can work:

: CuO + 2 HClO<sub>4</sub> → Cu(ClO<sub>4</sub>)<sub>2</sub> + H<sub>2</sub>O

Anhydrous copper(II) perchlorate can be prepared by [[silver perchlorate]] in [[diethyl ether]], followed by addition of copper(II)bromide. Silver bromide precipitates out of the solution, while copper(II) perchlorate can be obtained by evaporating the ether.<ref>Monnier, G.; Annales de Chimie (Cachan, France); vol. 2; (1957); p. 14 - 57 ; (from Gmelin)</ref> Copper(II) chloride can also be used.<ref>Dartiguenave, Michele; Dartiguenave, Yves; Guitard, Andre; Mari, Alain; Beauchamp, Andre L.; Polyhedron;
vol. 8; (1989); p. 317 - 324</ref>

==Projects==
*Make [[Bis(ethylenediamine)copper(II) perchlorate]]

==Handling==
===Safety===
Copper(II) perchlorate is a powerful oxidizer. Perchlorates are toxic.

===Storage===
Should be kept in a clean bottle, away from any reducing agents or combustible materials.

===Disposal===
Copper(II) perchlorate should be reduced to chloride and the copper recycled.

==References==
<references/>
===Relevant Sciencemadness threads===
*[http://www.sciencemadness.org/talk/viewthread.php?tid=25497 Making copper perchlorate ? Is this method valid ?]

[[Category:Chemical compounds]]
[[Category:Inorganic compounds]]
[[Category:Copper compounds]]
[[Category:Perchlorates]]
[[Category:Oxidizing agents]]