Hexaammine cobalt (III) chloride

Structural formula
General
Surname	Hexaammine cobalt (III) chloride
other names	Luteocobalt chloride Cobalt hexammine trichloride Hexaammine cobalt trichloride
Molecular formula	[Co (NH 3 ) 6 ] Cl 3
Brief description	orange odorless solid
External identifiers / databases
CAS number 10534-89-1 EC number 234-103-9 ECHA InfoCard 100.030.991 PubChem 159295 ChemSpider 21106428 Wikidata Q2627616
properties
Molar mass	267.48 g mol −1
Physical state	firmly
density	1.71 g cm −3
solubility	poorly soluble in water insoluble in ethanol
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 351-317 P: 261-280-302 + 352-321-405-501
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Hexaammine cobalt (III) chloride is a chemical compound from the group of ammine complexes and chlorides . The connection is one of the today by Alfred Werner named Werner complexes , which include also the related Hexaammincobalt (III) nitrate , Hexaammincobalt (II) iodide and Hexaammincobalt (III) iodide belong.

Extraction and presentation

Hexaammine cobalt (III) chloride can be obtained by reacting cobalt (II) chloride hexahydrate with ammonium chloride and ammonia in a stream of air.

${\displaystyle \mathrm {4\ CoCl_{2}\ +4\ NH_{4}Cl+20\ NH_{3}+O_{2}\longrightarrow } }$ ${\displaystyle \mathrm {4\ [Co(NH_{3})_{6}]Cl_{3}+2\ H_{2}O} }$

properties

Hexaammine cobalt (III) chloride is an orange, wine or brownish red, odorless crystalline solid that is sparingly soluble in water. When boiling in water, cobalt (II) hydroxide is formed . At temperatures above 215 ° C, decomposition occurs with release of ammonia. The compound was discovered by Citoyen Tassaert in 1798 .

use

Hexaammine cobalt (III) chloride is used in biochemistry.

Individual evidence

1. ↑ 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.
2. ↑ ^{a b c d e f} data sheet Hexaammincobalt (III) chloride, 99% from AlfaAesar, accessed on August 18, 2013 ( PDF )(JavaScript required) .
3. ↑ ^{a b c} Georg Brauer: Handbook of preparative inorganic chemistry . 3., reworked. Edition. tape III . Enke, Stuttgart 1981, ISBN 3-432-87823-0 , pp. 1675 .
4. ↑ Data sheet Hexaamminecobalt (III) chloride, 99% from Sigma-Aldrich , accessed on August 18, 2013 ( PDF ).
5. ↑ uni-freiburg: Chemistry of Metals, chap. 8.3.
6. ^ Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . Taylor & Francis, 2011, ISBN 1-4398-1462-7 , pp. 196 ( limited preview in Google Book search).
7. ↑ Lutz H. Gade: coordination chemistry . John Wiley & Sons, 2012, ISBN 3-527-66394-0 , pp. 20 ( limited preview in Google Book search).
8. ↑ JR Rusche, P. Howard-Flanders: Hexamine cobalt chloride promotes intermolecular ligation of blunt end DNA fragments by T4 DNA ligase. In: Nucleic acids research. Volume 13, Number 6, March 1985, ISSN  0305-1048 , pp. 1997-2008, PMID 4000951 , PMC 341130 (free full text).