Cobalt (II) formate

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Structural formula
2.svgFormate anionCobaltion
General
Surname Cobalt (II) formate
other names
  • Cobalt (II) formate
  • Cobalt methanoate
Molecular formula C 2 H 2 CoO 4
External identifiers / databases
CAS number
  • 544-18-3 (pure substance)
  • 6424-20-0 (dihydrate)
EC number 208-864-2
ECHA InfoCard 100.008.059
PubChem 10998
ChemSpider 10532
Wikidata Q1104467
properties
Molar mass 148.97 g mol −1
Physical state

firmly

density

2.2186 g cm −3 (dihydrate, 22 ° C)

solubility

50.3 g l −1 dihydrate at 20 ° C

safety instructions
GHS hazard labeling
no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Cobalt (II) formate is the cobalt salt of formic acid with the constitutional formula Co (HCOO) 2 .

presentation

Cobalt (II) formate can be produced from cobalt (II) carbonate and formic acid.

A synthesis from cobalt (II) chloride and D - xylose in ethanol has also been published.

properties

The water of crystallization was first determined by H. Stallo in 1878, the crystal structure of cobalt (II) formate dihydrate was first investigated in 1966. It crystallizes in the monoclinic crystal system in the space group P 2 1 / c (space group no. 14) with the lattice parameters a = 8.68  Å , b = 7.16 Å, c = 9.27 Å and β = 97.4 ° . In the unit cell contains four formula units . It is isomorphic to many other formates of divalent transition metals (e.g. nickel , manganese , magnesium , copper , zinc , iron and cadmium formate ). Template: room group / 14

use

Elemental cobalt can be obtained by reductive decomposition of cobalt (II) formate at 300–420 ° C.

Individual evidence

  1. ↑ a b c F. W. Clarke: Some determinations of specific weights . In: Ber. German chem. Ges. 1878 , 11 , p. 1504. Full text
  2. ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Inorganic Compounds, pp. 4-60.
  3. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
  4. ↑ a b c A. Kaufman, C. Afshar, M. Rossi, DE Zacharias, JP Glusker : Metal ion coordination in cobalt format dihydrate . In: Structural Chemistry 1992 , 4 (3), pp. 191-198. doi : 10.1007 / BF00679345
  5. ↑ AS Antsyshkina, MK Guseinova, MA Porai-Koshits : Crystal structure of cobalt formats dihydrate . In: Journal of Structural Chemistry 1967 , 8 (2), pp. 321-322. doi : 10.1007 / BF00745663
  6. ↑ G. Rienäcker, JW Birckenstaedt, M. Schubert-Birckenstaedt, G. Techel: Surface, catalytic effectiveness and heat of solution of cobalt-magnesium oxide mixed formate contacts . In: Journal for inorganic and general chemistry 1957 , 289 (1-4), pp. 29-39. doi : 10.1002 / zaac.19572890105 .