Multiple Choice
Iron crystallizes in the body-centered cubic (bcc) lattice. What is the coordination number for Fe in this structure?
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24. Transition Metals and Coordination Compounds
Coordination Numbers & Geometry
Multiple Choice
What is the coordination number of the metal ion in the complex [Fe(CN)_6]^{4-}?
A
6
B
8
C
2
D
4
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Verified step by step guidance1
Identify the central metal ion in the complex, which is Fe (iron) in this case.
Recognize that the coordination number is the number of ligand atoms directly bonded to the central metal ion.
Look at the ligands attached to the metal ion. Here, the complex is [Fe(CN)_6]^{4-}, meaning there are 6 cyanide (CN) ligands.
Each cyanide ligand binds to the metal ion through one atom (the carbon atom), so each ligand contributes one coordination site.
Therefore, the coordination number is equal to the number of ligands, which is 6.
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