Chromium(II) oxide

Chemical compound From Wikipedia, the free encyclopedia

Chromium(II) oxide

Chromium(II) oxide (CrO) is an inorganic compound composed of chromium and oxygen.[1] It is a black powder that crystallises in the rock salt structure.[2] Hypophosphites may reduce chromium(III) oxide to chromium(II) oxide:

H3PO2 + 2 Cr2O3 → 4 CrO + H3PO4
Quick Facts Names, Identifiers ...
Chromium(II) oxide
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Names
IUPAC name
chromium(II) oxide
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/Cr.O
    Key: XVOFZWCCFLVFRR-UHFFFAOYSA-N
  • O=[Cr]
Properties
CrO
Molar mass 67.996 g/mol
Appearance black
Melting point 300 °C (572 °F; 573 K) (decomposes)
Structure
cubic, cF8
Fm3m, No. 225
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
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It is readily oxidized by the atmosphere. CrO is basic, while CrO3 is acidic, and Cr2O3 is amphoteric.[3]

CrO occurs in the spectra of luminous red novae, which occur when two stars collide. It is not known why red novae are the only objects that feature this molecule; one possible explanation is an as-yet-unknown nucleosynthesis process.[4]

See also

References

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