Atomistry » Iron » Chemical Properties » Carbonyl Penta-Ferrocyanides
Atomistry »
  Iron »
    Chemical Properties »
      Carbonyl Penta-Ferrocyanides »

Carbonyl Penta-Ferrocyanides, M3[Fe(CN)5CO]

Addition of ferric chloride to certain liquors produced in the manufacture of Prussian blue in a French factory by the methylamine method resulted in the precipitation of a violet compound. Several hundred grams of this were isolated by Muller, warmed with potassium carbonate and hydroxide successively, and the filtered solution allowed to crystallise. The product thus isolated crystallised in thin scales and rectangular prisms, and proved to be the potassium salt of an entirely new acid, namely hydrogen carbonyl ferrocyanide, H3Fe(CN)5.CO. Following up this discovery, Muller succeeded in preparing a series of well-defined salts.

Constitution

The constitution to be assigned to these derivatives depends very largely upon the views accepted for the constitution of ferrocyanides in general. The carbonyl group clearly replaces а С:NH group in the ferrocyanide molecule, or, regarded from another standpoint, divalent oxygen replaces the divalent NH group without effecting any alteration in the carbon nucleus of the molecule. Adopting his cyclic formula for ferrocyanic acid, Friedel therefore suggests the following graphical representation of the change: -

(ferrocyanide)(carbonyl ferrocyanide).

Last articles

Zn in 7O75
Zn in 7O73
Zn in 7O4I
Zn in 7O72
Zn in 7O4J
Zn in 7NVR
Zn in 7NVY
Zn in 7NVZ
Zn in 7NW0
Zn in 7O4K
© Copyright 2008-2020 by atomistry.com
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy