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Dichlorine heptoxide
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Wikipedia
Dichlorine heptoxide is the chemical compound with the formula Cl2O7. This chlorine oxide is the anhydride of perchloric acid. It is produced by the careful distillation of perchloric acid in the presence of the dehydrating agent phosphorus pentoxide:
- 2 HClO4 + P4O10 → Cl2O7 + H2P4O11
Cl2O7 is an endothermic molecule, which means that it is intrinsically unstable.
- Cl2O7 → Cl2 + 3.5 O2 ΔH = 135 kJ/mol
Cl2O7 is bent with Cl-O-Cl angle of 118.6° giving the molecule C2 symmetry. The terminal Cl-O distances are 1.709 Å and the Cl=O distances are 1.405 Å. In this compound, chlorine exists in its highest formal oxidation state of 7+, although the bonding in this hypervalent molecule is significantly covalent.
Safety
Cl2O7 is strong oxidizer as well as an explosive that can be set off with flame or mechanical shock.References
External links
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Last updated on Sunday April 06, 2008 at 05:38:27 PDT (GMT -0700)
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This article is licensed under the GNU Free Documentation License.
Last updated on Sunday April 06, 2008 at 05:38:27 PDT (GMT -0700)
View this article at Wikipedia.org - Edit this article at Wikipedia.org - Donate to the Wikimedia Foundation
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