K3CoCN6
K3CoCN6, also called potassium hexacyanocobaltate(III), is the potassium salt of the hexacyanocobaltate(III) anion [Co(CN)6]3−. In solid form it consists of the octahedral [Co(CN)6]3− complex anion accompanied by three potassium counterions. The cobalt center is in the +3 oxidation state and is coordinated by six cyanide ligands through carbon atoms, giving a highly symmetric octahedral geometry.
The compound is typically encountered as a readily soluble inorganic salt in water; solutions contain the [Co(CN)6]3−
Preparation generally follows standard cyanometallate methods, joining cobalt(III) sources with cyanide under conditions that promote formation
Safety: K3CoCN6 contains cyanide ligands and should be handled with appropriate precautions. Acidic conditions can liberate