Zinc acetate
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| Zinc acetate | |
|---|---|
| Image:Zinc acetate.jpg | |
| General | |
| Systematic name | Zinc acetate |
| Other names | Acetic acid, zinc salt Zinc(II) salt Dicarbomethoxyzinc Zinc diacetate |
| Molecular formula | C4H10O6Zn (dihydrate) |
| SMILES | ? |
| Molar mass | 219.50 g/mol (dihydrate) 183.48 g/mol (anhydrous) |
| Appearance | White solid (all forms) |
| CAS number | [5970-45-6] (Hydrate) [557-34-6] (anhydrous) |
| Properties | |
| Density and phase | ? g/cm3 |
| Solubility in water | 43 g/100 mL |
| Melting point | Decomposes 200 °C |
| Boiling point | decomp. |
| Structure | |
| Molecular shape | ? |
| Coordination geometry |
octahedral (dihydrate) |
| Crystal structure | ? |
| Hazards | |
| MSDS | External MSDS |
| Main hazards | mildly toxic |
| NFPA 704 |
0
1
0
|
| R/S statement (dihydrate) | R: 22-36-50/53 S: 26-60-61 |
| RTECS number | ZG8750000 |
| Supplementary data page | |
| Structure and properties |
n, εr, etc. |
| Thermodynamic data |
Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Related compounds | |
| Other anions | zinc chloride |
| Other cations | Copper(II) acetate |
| Related compounds | Basic beryllium acetate |
| Except where noted otherwise, data are given for materials in their standard state (at 25°C, 100 kPa) Infobox disclaimer and references |
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Zinc acetate is the chemical compound with the formula Zn(O2CCH3)2 but more commonly refers to the dihydrate Zn(O2CCH3)2(H2O)2. Both the hydrate and the anhydrous forms are colorless solids that are commonly used in chemical synthesis and as dietary supplements. It is prepared by the action of acetic acid on zinc carbonate or zinc metal.
Contents |
[edit] Molecular structures
Anhydrous zinc acetate adopts a polymeric structure consisting of zinc in tetrahedral O4 coordination, each tetrahedron being connected to neighbors by the acetate groups.[1] The acetate ligands are not bidentate. In contrast, most metal diacetates feature metals in octahedral coordination with bidentate acetate groups. Zinc acetate dihydrate features octahedral zinc, wherein both acetate groups are bidentate.[2]
[edit] Basic zinc acetate
Heating Zn(CH3CO2)2 in a vacuum results in loss of acetic anhydride, leaving a residue of basic zinc acetate, Zn4O(CH3CO2)6. This cluster compound has the tetrahedral structure shown below. This species closely resembles the corresponding basic acetate of beryllium although it is slightly expanded with Zn-O distances ~1.97 vs ~1.63 Å for Be4O(OAc)6.[3]
[edit] Applications
[edit] Dietary and medicinal applications
Zinc acetate is used as a dietary supplement and in lozenges used to treat the common cold. It is often used to treat zinc deficiencies, for instance Wilson's disease. Zinc acetate is also found in the form of an ointment, a topical lotion.
[edit] Industrial applications
Industrial applications include wood preserving, manufacturing other zinc salts, polymers, manufacture of ethylene acetate, as a dye mordant, and analytical reagent.
Zinc acetate is a precursor in sol-gel route to the transparent semiconductor zinc oxide.
[edit] References
- ^ Capilla, A. V.; Aranda, R. A. “Anhydrous Zinc(II) Acetate (CH3-COO)2Zn” Crystal Structure Communications 1979 ,volume 8, 795-797.
- ^ Van Niekerk, J. N.; Schoening, F. R. L.; Talbot, J. H. “The Crystal Stucture of Zinc Acetate Dihydrate, Zn(CH3COO)2.H2O” Acta Crystallographica 1953, volume 6, pages 720-723.
- ^ Koyama, H.; Saito, Y. “The Crystal Structure of Zinc Oxyacetate, Zn4O(CH3COO)6” Bulletin of the Chemical Society of Japan, 1954, volume 27, pages 112-114.
[edit] External links
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