POTASSIUM FERRIC OXALATE Chemische Eigenschaften,Einsatz,Produktion Methoden

Beschreibung

Potassium ferri oxalate , is a chemical compound with the formula K₃[Fe(C₂O₄)₃], where iron is in the +3 oxidation state. It is an octahedral transition metal complex in which three bidentate oxalate ions are bound to an iron center. Potassium acts as a counterion, balancing the -3 charge of the complex. Crystals of the trihydrated form of the complex, K₃[Fe(C₂O₄)₃]·3H₂O, are emerald green in color. In solution, the salt ionizes to give the ferrioxalate anion, [Fe(C₂O₄)₃]^3- , which appears fluorescent green in color. Potassium ferrioxalate is often used in chemical actinometry.

Chemische Eigenschaften

Monoclinic green crystals. Loses 3H 2 O at 100C, decomposes at 230C. Soluble in water and acetic acid; incompatible with alkali and ammonia, since these react to precipitate ferric hydroxide.

Charakteristisch

The ferrioxalate complex exhibits optical activity since there are two non-superimposable stereoisomers of the complex. In accordance with the IUPAC convention, the isomer with the left-handed screw axis is assigned the Greek symbol Λ (lambda). Its mirror image with the right-handed screw axis is given the Greek symbol Δ (delta).

Verwenden

Photography and blueprinting.

synthetische

The complex can be synthesized from the reaction between iron (III) sulfate, barium oxalate and potassium oxalate :
Fe₂(SO₄)₃ + 3 BaC₂O₄ + 3 K₂C₂O₄ →
2K₃[Fe(C₂O₄)₃] + 3BaSO₄
The reactants are dissolved in water and heated for around 1.5 hours. BaSO₄ precipitates out leaving behind the newly formed complex in solution. The complex can then be obtained by filtering off the BaSO₄ and cooling the solution so that it crystallizes out.

Reaktionen

In solution, the ferrioxalate complex undergoes photoreduction. In this process, the complex absorbs a photon of light and subsequently decomposes to form Fe(C₂O₄)₂^2- and CO₂. The iron centre is reduced (gains an electron) from the +3 to the +2 oxidation state while an oxalate ion is oxidised to carbon dioxide :
2 [Fe(C₂O₄)₃]^3- + hν → 2 [Fe(C₂O₄)₂]^2- + C₂O₄ 2- + 2CO₂.

POTASSIUM FERRIC OXALATE Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte

POTASSIUM FERRIC OXALATE Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.

Firmenname	Telefon	E-Mail	Land	Produktkatalog	Edge Rate
3B Pharmachem (Wuhan) International Co.,Ltd.	821-50328103-801 18930552037	3bsc@sina.com	China	15839	69

()Verwandte Suche:

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• POTASSIUM FERRIC OXALATE
• IRON (III) POTASSIUM OXALATE
• FERRIC POTASSIUM OXALATE