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ferricinium ion
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ferricinium ion

chemical ion
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The ferricinium ion is a positively charged species with the chemical formula (C5H5)2Fe+. It is formed when ferrocene, an organometallic compound consisting of two cyclopentadienyl rings sandwiching an iron atom, loses an electron. This oxidation process raises the iron atom's oxidation state from +2 to +3. Ferrocene itself is a stable, orange crystalline compound that behaves chemically like benzene, undergoing substitution reactions. The ferricinium ion is blue and is a salt containing the ferricinium cation. Ferricyanic acid, H3Fe(CN)6, is a separate, unstable brown crystalline acid obtained from ferricyanides.12

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7 Britannica Sources
  1. iron
  2. coordination compound - Coordination number
  3. ferrocene
  4. ferricyanic acid
  5. ferrocene
  6. fermium
  7. fermium

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