Pentacyanide derivatives

A series of complexes in which the cyanide ligands are modified or replaced arises from the decomposition of methyl and pyridiomethylcobalt(111) pentacyanide derivatives in acid solution. The reactions include protonation of a cyanide ligand, insertion of a cyanide ligand between the organic group and the cobalt atom to produce an imine (see Section VI,D), decomposition of this imine to an acyl product, and replacement of a cyanide ligand by water 100, 101). The products are listed in Table III, 29. 

The pentacyanide derivative unites with the carbon monoxide to yield sodium carbonyl ferrocyanide, Na3[Fe(CN)5.CO], which again interacts with the ferrous sulphate to yield the ferrous derivative, Fe3[Fe(CN)5CO]2, characterised by its violet colour (see p. 232). 

Pentacyanide Derivatives of Iron—Nitroso Penta-oyanoferrates—Carbonyl Penta-cyanoferrites—Nitrito Penta-cyanoferiites—Ammino Penta-cyano-ferntes—Aquo Penta-cyanoferrites—Aquo Penta-oyanoferrates—Sulphito Penta-cyanoferrites. 

The rate expressions are derived as follows The total concentration of cobalt, pentacyanide ion, dicyanide in solution, total dicyanide, and free cyanide are [Co], p, D, d, and c, respectively. When the catalyst concentration is small, by definition... 

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