Iron(II) forms a complex in hemoglobin. Two of the possibilities are [Fe(H2O)6]2+ and [Fe(CN)6]4– (a) [Fe(H2O)6]2+ and [Fe(CN)6]4– should have the same geometry. What is this coordination environment? Draw it please. (b) For both [Fe(H2O)6]2+ and [Fe(CN)6]4–, draw an energy diagram showing orbital splitting (c) Predict the number of unpaired electrons (d) Identify the ion as low spin or high spin. (e) Is either ion paramagnetic? (f) What would the color of each form of these forms of hemoglobin?

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Iron(II) forms a complex in hemoglobin. Two of the possibilities are [Fe(H2O)6]2+ and [Fe(CN)6]4–


(a) [Fe(H2O)6]2+ and [Fe(CN)6]4– should have the same geometry. What is this coordination environment? Draw it please.


(b) For both [Fe(H2O)6]2+ and [Fe(CN)6]4–, draw an energy diagram showing orbital splitting

(c) Predict the number of unpaired electrons
(d) Identify the ion as low spin or high spin.
(e) Is either ion paramagnetic?
(f) What would the color of each form of these forms of
hemoglobin?

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