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Manganese(II) acetate

Chemical compound From Wikipedia, the free encyclopedia

Manganese(II) acetate are chemical compounds with the formula Mn(CH3CO2)2·(H2O)n where n = 0, 2, 4. These materials are white or pale pink solids. Some of these compounds are used as a catalyst and as fertilizer.[3]

Quick facts Names, Identifiers ...
Manganese(II) acetate[1]
Names
IUPAC name
Manganese(II) acetate
Other names
Manganese diacetate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.010.305 Edit this at Wikidata
UNII
  • InChI=1S/2C2H4O2.Mn/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 checkY
    Key: UOGMEBQRZBEZQT-UHFFFAOYSA-L checkY
  • CC([O-])=O.CC([O-])=O.[Mn+2]
Properties
Mn(CH3CO2)2 (anhydrous)
Mn(CH3CO2)2·4H2O (tetrahydrate)
Molar mass 173.027 g/mol (anhydrous)
245.087 g/mol (tetrahydrate)
Appearance white crystals (anhydrous)
light pink monoclinic crystals (tetrahydrate)
Density 1.74 g/cm3 (anhydrous)
1.59 g/cm3 (tetrahydrate)
Melting point 210 °C (410 °F; 483 K) (anhydrous)
80 °C (tetrahydrate)
Solubility soluble in water (about 700g/L at 20°C for tetrahydrate), methanol, acetic acid (anhydrous)
soluble in water, ethanol (tetrahydrate)
+13,650·10−6 cm3/mol
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
1
0
0
Flash point > 130 °C (266 °F; 403 K) (tetrahydrate)
Lethal dose or concentration (LD, LC):
2940 mg/kg (rat, oral)[2]
Related compounds
Other anions
 Manganese(II) fluoride
Manganese(II) chloride
Manganese(II) bromide
Other cations
 Zinc acetate
Mercury(II) acetate
Silver acetate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation

Manganese(II) acetate can be formed by treating either manganese(II,III) oxide or manganese(II) carbonate with acetic acid:[4]

Mn3O4 + 2 CH3CO2H → Mn(CH3CO2)2 + Mn2O3 + H2O
MnCO3 + 2 CH3CO2H → Mn(CH3CO2)2 + CO2 + H2O

Structure

The anhydrous material and dihydrate Mn(CH3CO2)2·2H2O are coordination polymers. The dihydrate has been characterized by X-ray crystallography. Each Mn(II) center is surrounded by six oxygen centers provided by aquo ligands and acetates.

Subunit of the structure of the dihydrate of manganese(II) acetate.[5]

Compounds with similar stoichiometry

References

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