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 complex ion [Co(en)_2(C_2O_4)]^+?
A
5
B
4
C
6
D
7
Verified step by step guidance1
Understand the concept of coordination number: The coordination number is the number of ligand atoms that are directly bonded to the central metal ion in a complex.
Identify the ligands in the complex ion [Co(en)_2(C_2O_4)]^+: The ligands are ethylenediamine (en) and oxalate (C_2O_4).
Determine the denticity of each ligand: Ethylenediamine (en) is a bidentate ligand, meaning it can form two bonds with the central metal ion. Oxalate (C_2O_4) is also a bidentate ligand.
Calculate the total number of bonds formed by the ligands: Since there are two ethylenediamine ligands, they contribute 2 x 2 = 4 bonds. The oxalate ligand contributes 2 bonds.
Add the number of bonds to find the coordination number: The total number of bonds formed by the ligands is 4 (from en) + 2 (from C_2O_4) = 6. Therefore, the coordination number of the complex ion is 6.
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