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Cadmium acetate

From Wikipedia, the free encyclopedia
Cadmium acetate
Names
IUPAC name
Cadmium acetate
Other names
Cadmium diacetate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard100.008.049Edit this at Wikidata
EC Number
  • 208-853-2
RTECS number
  • AF7505000
UNII
UN number2570
  • InChI=1S/2C2H4O2.Cd/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 checkY
    Key: LHQLJMJLROMYRN-UHFFFAOYSA-L checkY
  • InChI=1/2C2H4O2.Cd/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2
    Key: LHQLJMJLROMYRN-NUQVWONBAK
  • ionic form: [Cd+2].[O-]C(=O)C.[O-]C(=O)C
  • coordination form: O=C(C)O[Cd]OC(C)=O
Properties
Cd(CH3COO)2 (anhydrous)
Cd(CH3COO)2·2H2O (dihydrate)
Molar mass230.500 g/mol (anhydrous)
266.529 g/mol (dihydrate)
Appearancecolorless crystals (anhydrous)
white crystals (dihydrate)
Odoracetic acid
Density2.341 g/cm3 (anhydrous)
2.01 g/cm3 (dihydrate)
Melting point255 °C (491 °F; 528 K) (anhydrous) dihydrate decomposes at 130°C[1]
soluble (anhydrous), very soluble (dihydrate)
Solubilitysoluble inmethanol,ethanol (anhydrous)
soluble inethanol (dihydrate)
−83.7·10−6 cm3/mol
Structure
monoclinic
Hazards
GHS labelling:
GHS07: Exclamation markGHS09: Environmental hazardGHS06: Toxic
Warning
H302,H312,H332,H410
P261,P264,P270,P271,P273,P280,P301+P312,P302+P352,P304+P312,P304+P340,P312,P322,P330,P363,P391,P501
NFPA 704 (fire diamond)
NIOSH (US health exposure limits):
PEL (Permissible)
[1910.1027] TWA 0.005 mg/m3 (as Cd)[2]
REL (Recommended)
Ca[2]
IDLH (Immediate danger)
Ca [9 mg/m3 (as Cd)][2]
Related compounds
Otheranions
Cadmium fluoride
Cadmium chloride
Cadmium bromide
Cadmium iodide
Othercations
Zinc acetate
Mercury(II) acetate
Silver acetate
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)
Chemical compound

Cadmium acetate is thechemical compound with theformulaCd(O2CCH3)2(H2O)2. The compound is marketed both as the anhydrous form and as adihydrate, both of which are white or colorless. Only the dihydrate has been verified byX-ray crystallography.

Preparation, reactions, and uses

[edit]

It forms by treatingcadmium oxide withacetic acid:[3][4]

CdO + 2 CH3CO2H + H2O → Cd(O2CCH3)2(H2O)2

It can also be prepared by treatingcadmium nitrate withacetic anhydride.[5]

Cadmium acetate has few applications. By reaction withtrioctylphosphine selenide, it has often been used as a precursor tocadmium selenide and related semiconductors.[6]

Structure of the dihydrate

[edit]
Fragment of the structure of cadmium diacetate dihydrate. Legend: red = O, black = C, blue = Cd.

Unlike the coordination geometry of zinc inzinc diacetate dihydrate, cadmium is seven coordinate inCd(O2CCH3)2(H2O)2.[7] It is acoordination polymer, featuring acetate ligands interconnecting cadmium centers.

Safety

[edit]

Cadmium compounds are consideredGroup 1 carcinogens by the IARC.

References

[edit]
  1. ^Lide, David R. (1998).Handbook of Chemistry and Physics (87 ed.). Boca Raton, Florida: CRC Press. p. 447.ISBN 0-8493-0594-2.
  2. ^abcNIOSH Pocket Guide to Chemical Hazards."#0087".National Institute for Occupational Safety and Health (NIOSH).
  3. ^Gangolli, S. (1999).The Dictionary of Substances and Their Effects. London: Royal Society of Chemistry. pp. 12–13.ISBN 9780854048137. Retrieved2009-03-29.
  4. ^Patnaik, Pradyot (2003).Handbook of Inorganic Chemical Compounds. McGraw-Hill Professional. pp. 143–144.ISBN 0-07-049439-8. Retrieved2009-03-29.
  5. ^F. Wagenknecht; R. Juza (1963). "Cadmium acetate". In G. Brauer (ed.).Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 2. NY, NY: Academic Press. p. 1105.
  6. ^García-Rodríguez, Raúl; Hendricks, Mark P.; Cossairt, Brandi M.; Liu, Haitao; Owen, Jonathan S. (2013). "Conversion Reactions of Cadmium Chalcogenide Nanocrystal Precursors".Chemistry of Materials.25 (8):1233–1249.doi:10.1021/cm3035642.
  7. ^Harrison, W.; Trotter, J. (1972). "Crystal and molecular structure of cadmium diacetate dihydrate".Journal of the Chemical Society, Dalton Transactions (8–9): 956.doi:10.1039/dt9720000956.
Cadmium(I)
Cadmium(II)
Acetyl halides and salts of theacetate ion
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