The coordination sphere is [Fe(CN)₆]⁴⁻, and the counter ion is K⁺ in the complex K₄[Fe(CN)₆]. The entire coordination compound is enclosed in square brackets.
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The coordination sphere is [Fe(CN)₆]⁴⁻, and the counter ion is K⁺ in the complex K₄[Fe(CN)₆]. The entire coordination compound is enclosed in square brackets.
In the complex K₄[Fe(CN)₆], the coordination sphere is [Fe(CN)₆]⁴⁻, consisting of the central metal ion (Fe²⁺) coordinated with six cyanide ligands. The counter ion is K⁺, which balances the overall charge of the complex. The coordination sphere represents the central metal and its surrounding ligands enclosed in square brackets, while the counter ion is the ionisable group outside the brackets. This formulation adheres to the additive nomenclature principles, providing a concise and unambiguous description of the complex, including its coordination sphere and counter ion.