Relating to or denoting a chemical compound containing both cobalt and cyanide groups; a coordination complex of cobalt with cyanide ligands.
From cobaltic (cobalt-containing) plus cyanic (containing cyanide, from Greek 'kyanos' meaning blue). 19th-century chemistry terminology.
Cobalticyanic compounds were historically important for understanding coordination chemistry—they showed that metals could be surrounded by multiple cyanide molecules in precise geometric arrangements, revealing chemistry's mathematical nature.
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