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| Manganese(II) acetate | |
|---|---|
| Names: | manganese(II) acetate manganese diacetate manganouse acetate manganese(II) ethanoate |
| Formula: | Mn(CH3COO)2 (anhydrous) Mn(CH3COO)2 · 4H2O (tetrahydrate) |
| Molar mass: | 173.026 g/mol (anhydrous) 245.085 g/mol (tetrahydrate) |
| Density: | 1.74 g/cm3 (anhydrous) 1.589 g/cm3 (tetrahydrate) |
| Crystal system: | monoclinic (tetrahydrate) a=11.1 Å, b=17.51 Å, c=9.09 Åα=90°, β=118.62°, γ=90° |
| Shapes: |
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| Color: | light-pink |
| Melting point: | 80 °C353.15 K <br />176 °F <br />635.67 °R <br /> (tetrahydrate) |
| Decomposition point: | 210 °C483.15 K <br />410 °F <br />869.67 °R <br /> (anhydrous) |
| Magnetic properties: | paramagnetic |
| Stability: | stable (tetrahydrate) |
| Hardness: | very fragile |
| Toxicity: | non-toxic LD50=2940mg/kg |
Description
Organic compound, salt of bivalent transitional metal manganese and organic acetic acid. From water solutions crystallizes as tetrahydrate.
Precursors
Reaction between manganese(II) hydroxycarbonate, carbonate or hydroxide and excess of acetic acid
Chemical equation:
100.00g of manganese(II) acetate tetrahydrate а 41.60g of manganese hydroxycarbonate or 46.90g of carbonate or 36.29g of hydroxide and 70.01g of 70% acetic acid is required.Add acid to the flask, then add small parts of manganese compound with stirring until it will totally dissolve or, if you use carbonate, until carbon dioxide emission will stop. After reaction will stop, filter the solution and use it for crystal growing.
Reaction between chloride, sulfate or manganese(II) nitrate and excess of concentrated acetic acid
Chemical equation:
100.00g of manganese(II) acetate tetrahydrate а 80.75g of manganese(II) chloride tetrahydrate or 113.06g of manganese(II) sulfate heptahydrate or 117.12g of manganese(II) nitrate hexahydrate and 49.00g of glacial acid acetic or 70.01g of 70% acetic acid is required.Add to the flask with hot manganese compounds solution a acid solution with heating and stirring. Cooling this mixture will cause forming a large amount of crystalline precipitate. Filter precipitate and wash it wish small amount of glacial acetic acid, then filter the solution and use it for crystal growing.
Reaction between manganese(II) nitrate and sodium acetate
Chemical equation:
100.00g of manganese(II) acetate tetrahydrate а 117.12g of manganese(II) nitrate hexahydrate and 111.05g of sodium acetate trihydrate is required.Add to the flask with hot manganese(II) nitrate solution a sodium acetate solution with heating and stirring. Cooling this mixture will cause forming a large amount of crystalline precipitate. Filter precipitate and wash it wish small amount of cold water, then filter the solution and use it for crystal growing.
Reaction between manganese(II) sulfate and calcium or lead(II) acetate
You can use manganese(II) chloride instead of sulfate if you use lead salt..
Chemical equation:
100.00g of manganese(II) acetate tetrahydrate а 80.75g of manganese(II) chloride tetrahydrate or 113.06g of manganese(II) sulfate heptahydrate and 71.89g of calcium acetate monohydrate or 154.78g of lead(II) acetate trihydrate is required.Add to the flask with calcium or lead acetate solution small parts of manganese salt solution and stir. The large amount of poorly soluble precipitate will form. Settle it out and discard, then filter the solution carefully.
Influence of impurities
Water solutions are hydrolytically unstable and rapidly oxidizes by atmospheric oxygen to brown manganese(III) acetate.
So it`s recommended to add excess of acetic acid for stopping the hydrolysis.
Notes
Usually forms a supersaturated solution. Crystallization begins after placing the crystal seed into solution.
Storage conditions
Store in its original form or under several layers of varnish at average humidity and room temperature. Do not store in matchboxes or cotton wool and do not heat.
Solubility
Gallery
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Under the microscopeManganese(II) acetate, Sergey Sachkov, VKontakteVKontakte
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Under the microscopeManganese(II) acetate, Sergey Sachkov, VKontakteVKontakte
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Under the microscopeManganese(II) acetate, Sergey Sachkov, VKontakteVKontakte
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Under the microscopeManganese(II) acetate, Sergey Sachkov, VKontakteVKontakte
Sources
| Acetates | |
|---|---|
| Salts |
Calcium acetate (Ca(CH3COO)2) • Copper(II) acetate (Cu(CH3COO)2) • Chromium(II) acetate (Cr(CH3COO)2) • Gadolinium acetate (Gd(CH3COO)3) • Dysprosium acetate (Dy(CH3COO)3) • Holmium acetate (Ho(CH3COO)3) • Iron(II) acetate (Fe(CH3COO)2) • Lead(II) acetate (Pb(CH3COO)2) • Manganese(II) acetate (Mn(CH3COO)2) • Neodymium acetate (Nd(CH3COO)3) • Nickel acetate (Ni(CH3COO)2) • Samarium acetate (Sm(CH3COO)3) • Strontium acetate (Sr(CH3COO)2) • Sodium acetate (NaCH3COO) • Zinc acetate (Zn(CH3COO)2) |
| Double Salts |
Copper-calcium acetate (CuCa(CH3COO)4) • Uranyl-sodium acetate (NaUО2(CH3COO)3) • Uranyl-zinc-sodium acetate (NaZn(UO2)3(CH3COO)9) |
| Manganese compounds | |
|---|---|
| Salts |
Manganese(II) acetate (Mn(CH3COO)2) • Manganese(II) chloride (MnCl2) • Manganese(II) formate (Mn(COOH)2) • Manganese(II) sulfate (MnSO4) |
| Double salts |
Cerium(III)-cobalt-manganese nitrate (3(Co,Mn)(NO3)2 · 2Ce(NO3)3) • Cerium(III)-manganese nitrate (3Mn(NO3)2 · 2Ce(NO3)3) • Manganese(II)-ammonium sulfate ((NH4)2Mn(SO4)2) • Manganese(III)-ammonium sulfate (NH4Mn(SO4)2) • Manganese(II)-potassium sulfate (K2Mn(SO4)2) |