Chromium(II) acetate

Chromium(II) acetate

Names
IUPAC name Chromium(II) acetate hydrate
Other names chromous acetate, chromium diacetate, chromium(II) ethanoate
Identifiers
CAS Number	14976-80-8 Y
3D model (JSmol)	Interactive image
ChemSpider	107397 Y
ECHA InfoCard	100.224.848
PubChem CID	120304
RTECS number	AG3000000
UNII	H3FYF8441T Y
CompTox Dashboard (EPA)	DTXSID50890519
InChI InChI=1S/2C2H4O2.Cr/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 Y Key: LRCIYVMVWAMTKX-UHFFFAOYSA-L Y InChI=1/2C2H4O2.Cr/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 Key: LRCIYVMVWAMTKX-NUQVWONBAT
SMILES [Cr+2]1234([OH2])#[Cr+2]([OH2])(O[C-](C)O1)(O[C-](C)O2)(O(C)[C-]O3)O(C)[C-]O4
Properties
Chemical formula	C8H16Cr2O10
Molar mass	376.198 g·mol−1
Appearance	brick-red solid
Density	1.79 g/cm3
Melting point	dehydrates
Solubility in water	soluble in hot water, MeOH
Magnetic susceptibility (χ)	-5104.0·10−6 cm3/mol
Structure
Crystal structure	monoclinic
Coordination geometry	octahedral counting the Cr–Cr bond
Dipole moment	0 D
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	could react exothermically in air
Related compounds
Related compounds	Rh2(OAc)4(H2O)2 Cu2(OAc)4(H2O)2, molybdenum(II) acetate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

Chromium(II) acetate hydrate, also known as chromous acetate, is the coordination compound with the formula Cr₂(CH₃CO₂)₄(H₂O)₂. This formula is commonly abbreviated Cr₂(OAc)₄(H₂O)₂. This red-coloured compound features a quadruple bond. The preparation of chromous acetate once was a standard test of the synthetic skills of students due to its sensitivity to air and the dramatic colour changes that accompany its oxidation. It exists as the dihydrate and the anhydrous forms.

Cr₂(OAc)₄(H₂O)₂ is a reddish diamagnetic powder, although diamond-shaped tabular crystals can be grown. Consistent with the fact that it is nonionic, Cr₂(OAc)₄(H₂O)₂ exhibits poor solubility in water and methanol.