Textbook Question
What is the coordination number of the metal in each of the following complexes?
(d) [ZrF8]4-
(e) [Fe(EDTA)(H2O)]-
24. Transition Metals and Coordination Compounds
Coordination Numbers & Geometry
Multiple Choice
What is the coordination number of the central metal ion in the complex Na₂[V(C₂O₄)₃]?
A
6
B
3
C
8
D
4
Verified step by step guidance1
Identify the central metal ion in the complex. In Na₂[V(C₂O₄)₃], the central metal ion is V, which stands for vanadium.
Determine the ligands attached to the central metal ion. In this complex, the ligand is the oxalate ion, \( \text{C}_2\text{O}_4^{2-} \).
Count the number of oxalate ligands attached to the vanadium ion. The formula indicates there are three oxalate ions \( (\text{C}_2\text{O}_4) \) attached to vanadium.
Understand that each oxalate ion is a bidentate ligand, meaning it can form two bonds with the central metal ion. Therefore, each \( \text{C}_2\text{O}_4^{2-} \) contributes two coordination sites.
Calculate the coordination number by multiplying the number of oxalate ligands by the number of bonds each can form: \( 3 \text{ ligands} \times 2 \text{ bonds per ligand} = 6 \). Thus, the coordination number of vanadium in this complex is 6.
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