Zinc acetate

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Zinc acetate
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Names
IUPAC name
Zinc acetate
Other names
Acetic acid, Zinc salt
Acetic acid, Zinc(II) salt
Dicarbomethoxyzinc
Zinc diacetate
Identifiers
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3D model (JSmol)
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UN number 3077
  • InChI=1S/2C2H4O2.Zn/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 checkY
    Key: DJWUNCQRNNEAKC-UHFFFAOYSA-L checkY
  • InChI=1/2C2H4O2.Zn/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2
    Key: DJWUNCQRNNEAKC-NUQVWONBAP
  • [Zn+2].[O-]C(=O)C.[O-]C(=O)C
  • basic zinc acetate: C/C1=[O]/[Zn]\35O/C(C)=[O+]\[Zn]\26\[O]=C(C)/O[Zn]4(O1)/[O]=C(C)\O[Zn](=[O]/C(C)=[O]2)(O/C(C)=[O]3)[O]456
Properties
Zn(CH3COO)2(H2O)2 (dihydrate)
Molar mass 219.50 g/mol (dihydrate)
183.48 g/mol (anhydrous)
Appearance White solid (all forms)
Density 1.735 g/cm3 (dihydrate)
Melting point Decomposes at 237 °C (459 °F; 510 K) (dihydrate loses water at 100 °C)
Boiling point decomposes
43 g/100 mL (20 °C, dihydrate)
Solubility 1.5 g/100 mL (methanol)
−101.0·10−6 cm3/mol (+2 H2O)
Structure
octahedral (dihydrate)
tetrahedral
Pharmacology
A16AX05 (WHO)
Hazards
Related compounds
Other anions
 Zinc chloride
Other cations
 Copper(II) acetate
Related compounds
 Basic beryllium acetate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Template:Chembox Footer/trackingTemplate:Short description

Zinc acetate is a compound with the formula Zn(CH3CO2)2, which commonly occurs as the dihydrate Zn(CH3CO2)2·2H2O. Both the hydrate and the anhydrous forms are colorless solids that are used as dietary supplements. When used as a food additive, it has the E number E650.

Uses

Zinc acetate is a component of some medicines, e.g., lozenges for treating the common cold.[1][2][3][4] Zinc acetate can also be used as a dietary supplement.[5] As an oral daily supplement it is used to inhibit the body's absorption of copper as part of the treatment for Wilson's disease.[6] Zinc acetate is also sold as an astringent in the form of an ointment, a topical lotion, or combined with an antibiotic such as erythromycin for the topical treatment of acne.[7] It is commonly sold as a topical anti-itch ointment.

Zinc acetate is used as the catalyst for the industrial production of vinyl acetate from acetylene: Page Module:Chem2/styles.css has no content.CH3CO2H + C2H2 → CH3CO2CH=CH2. Approximately 1/3 of the worlds production uses this route, which because of its environmental impact, is mainly practiced in countries with relaxed environmental regulations such as China.[8]

Preparation

Zinc acetates are prepared by the action of acetic acid on zinc carbonate or zinc metal. Treatment of zinc nitrate with acetic anhydride is an alternative route.[9]

Structures

In anhydrous zinc acetate the zinc is coordinated to four oxygen atoms to give a tetrahedral environment, these tetrahedral polyhedra are then interconnected by acetate ligands to give a range of polymeric structures.[10][11][12]

In the dihydrate, zinc is octahedral, wherein both acetate groups are bidentate.[13][14]

Reactions

Heating Zn(CH3CO2)2 in a vacuum results in a loss of acetic anhydride, leaving a residue of "basic zinc acetate," with the formula Zn4O(CH3CO2)6. It can also be prepared by a reaction of glacial acetic acid with zinc oxide.[15] The cluster compound has a tetrahedral structure with an oxide ligand at its center.[16] Basic zinc acetate is a common precursor to metal-organic frameworks (MOFs).

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See also

References

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  1. ^ Page Module:Citation/CS1/styles.css has no content.Hemilä, H; Chalker, E (2015). "The effectiveness of high dose zinc acetate lozenges on various common cold symptoms: a meta-analysis". BMC Fam. Pract. 16 24. doi:10.1186/s12875-015-0237-6. PMC 4359576. PMID 25888289.
  2. ^ Page Module:Citation/CS1/styles.css has no content.Hemilä, H; Petrus, EJ (2016). "Zinc acetate lozenges for treating the common cold: an individual patient data meta-analysis". Br J Clin Pharmacol. 82 (5): 1393–1398. doi:10.1111/bcp.13057. PMC 5061795. PMID 27378206.
  3. ^ Page Module:Citation/CS1/styles.css has no content.Hemilä, H; Fitzgerald, JT (2017). "Zinc acetate lozenges may improve the recovery rate of common cold patients: an individual patient data meta-analysis". Open Forum Infect Dis. 4 (2) ofx059. doi:10.1093/ofid/ofx059. PMC 5410113. PMID 28480298.
  4. ^ Page Module:Citation/CS1/styles.css has no content."Zinc – Fact Sheet for Health Professionals". Office of Dietary Supplements, US National Institutes of Health. February 11, 2016. Retrieved November 15, 2018.
  5. ^ Page Module:Citation/CS1/styles.css has no content.Wegmüller, Rita; Tay, Fabian; Zeder, Christophe; Brnić, Marica; Hurrell, Richard F. (2014). "Zinc Absorption by Young Adults from Supplemental Zinc Citrate is Comparable with That from Zinc Gluconate and Higher than from Zinc Oxide". The Journal of Nutrition. 144 (2): 132–136. doi:10.3945/jn.113.181487. PMC 3901420. PMID 24259556.
  6. ^ Page Module:Citation/CS1/styles.css has no content."Wilson Disease". NIDDK. July 2014. Archived from the original on 2016-10-04. Retrieved November 15, 2018.
  7. ^ Page Module:Citation/CS1/styles.css has no content.Schachner, L.; Eaglstein, W.; Kittles, C.; Mertz, P. (1990). "Topical erythromycin and zinc therapy for acne". Journal of the American Academy of Dermatology. 22 (2 Pt 1): 253–60. doi:10.1016/0190-9622(90)70034-f. PMID 2138176.
  8. ^ Script error: No such module "Template wrapper".
  9. ^ Page Module:Citation/CS1/styles.css has no content.O. F. Wagenknecht; R. Juza (1963). "Zinc Acetate". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 2pages=1087. NY, NY: Academic Press.
  10. ^ Page Module:Citation/CS1/styles.css has no content.Clegg, W.; Little, I. R.; Straughan, B. P. (15 December 1986). "Monoclinic anhydrous zinc(II) acetate". Acta Crystallographica Section C. 42 (12): 1701–1703. Bibcode:1986AcCrC..42.1701C. doi:10.1107/S010827018609087X.
  11. ^ Page Module:Citation/CS1/styles.css has no content.He, Hongshan (15 November 2006). "A new monoclinic polymorph of anhydrous zinc acetate". Acta Crystallographica Section E. 62 (12): m3291–m3292. Bibcode:2006AcCrE..62m3291H. doi:10.1107/S1600536806046678.
  12. ^ Page Module:Citation/CS1/styles.css has no content.Capilla, A. V.; Aranda, R. A. (1979). "Anhydrous Zinc(II) Acetate (CH3-COO)2Zn". Crystal Structure Communications. 8: 795–797.
  13. ^ Page Module:Citation/CS1/styles.css has no content.van Niekerk, J. N.; Schoening, F. R. L.; Talbot, J. H. (10 September 1953). "The crystal structure of zinc acetate dihydrate, Zn(CH3COO)2.2H2O". Acta Crystallographica. 6 (8): 720–723. Bibcode:1953AcCry...6..720V. doi:10.1107/S0365110X53002015.
  14. ^ Page Module:Citation/CS1/styles.css has no content.Ishioka, T.; Murata, A.; Kitagawa, Y.; Nakamura, K. T. (15 August 1997). "Zinc(II) Acetate Dihydrate". Acta Crystallographica Section C. 53 (8): 1029–1031. Bibcode:1997AcCrC..53.1029I. doi:10.1107/S0108270197004484.
  15. ^ Page Module:Citation/CS1/styles.css has no content.Poshkus, Algirdas C. (June 1983). "Improved synthesis of basic zinc acetate, hexakis(.mu.-acetato)-.mu.-oxotetrazinc". Industrial & Engineering Chemistry Product Research and Development. 22 (2): 380–381. doi:10.1021/i300010a041.
  16. ^ Page Module:Citation/CS1/styles.css has no content.Koyama, H.; Saito, Y. (1954). "The Crystal Structure of Zinc Oxyacetate, Zn4O(CH3COO)6". Bull. Chem. Soc. Jpn. 27 (2): 112–114. doi:10.1246/bcsj.27.112.

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