Chromium acetate hydroxide

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Chromium(III) acetate hydroxide
Cr8(OH)13(OAc)12.svg
Names
IUPAC name
Chromium(III) acetate hydroxide
Other names
Acetic acid of the chromium salt,
Chromium(III)acetatehydroxide,Cr24%,
Chromic acetate hydroxide,
Chromium - acetic acid (3:7) dihydrate,
Chromium Acetic Acid,
Ccris 6345,
Identifiers
3D model (JSmol)
ECHA InfoCard 100.049.480 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 254-447-3
  • InChI=1S/12C2H4O2.8Cr.12H2O/c12*1-2(3)4;;;;;;;;;;;;;;;;;;;;/h12*1H3,(H,3,4);;;;;;;;;12*1H2/q;;;;;;;;;;;;8*+3;;;;;;;;;;;;/p-24
    Key: GEJBKRAUTRHOTI-UHFFFAOYSA-A
  • CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Cr+3].[Cr+3].[Cr+3].[Cr+3].[Cr+3].[Cr+3].[Cr+3].[Cr+3]
Properties
C24H48Cr8O36
Molar mass 1328.581 g·mol−1
Appearanceviolet solid
Density 1.484 g/cm3
soluble
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
Harmful by inhalation, in contact with skin and if swallowed, Irritating to eyes, respiratory system and skin
GHS labelling:
GHS-pictogram-exclam.svg
Warning
H302, H312, H315, H317, H319, H332, H335
Safety data sheet (SDS) MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chromium acetate hydroxide is the coordination complex with the formula [Cr2(OH)3(OAc)3]4. A dark violet solid, it crystallizes as the triacontatetrahydrate (34 molecules of water of crystallization). It is water soluble. [1]

Contents

Structure

The complex is a tetramer of binuclear Cr2(OH)3(OAc)3. The subunits are linked by acetate and hydroxide ligands. The oxidation state of chromium is +3, which explains the stability of the complex since octahedral d3 ions give kinetically robust complexes. Overall, the complex's structure is unusual compared to other transition metal carboxylate complexes.

See also

References

  1. ↑ Eshel, Michal; Bino, Avi; Felner, Israel; Johnston, David C.; Luban, Marshall; Miller, Lance L. (2000). "Polynuclear Chromium(III) Carboxylates. 1. Synthesis, Structure, and Magnetic Properties of an Octanuclear Complex with a Ring Structure". Inorganic Chemistry. 39 (7): 1376–1380. doi:10.1021/ic9907009. PMID   12526439.
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