Textbook Question
Write the formula for each of the following compounds.
(a) Tetraammineplatinum(II) chloride
(b) Sodium hexacyanoferrate(III)
24. Transition Metals and Coordination Compounds
Writing Formulas of Coordination Compounds
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Write a formula for following coordination compound: sodium tris(ethylenediamine)oxalatonickelate(I).
A
Na2[Ni(en)3CO2]
B
Na[Ni(NH3)3CO2]
C
Na[Ni(en)3C2O4]
D
Na[Ni(NH3)3C2O4]
Verified step by step guidance1
Identify the central metal ion in the coordination compound. In this case, it is nickel (Ni).
Determine the ligands attached to the central metal ion. The ligands are ethylenediamine (en) and oxalate (C2O4).
Count the number of each type of ligand. The compound has three ethylenediamine ligands and one oxalate ligand.
Write the formula for the complex ion, placing the ligands around the central metal ion. The complex ion is [Ni(en)3C2O4].
Add the counter ion to balance the charge of the complex ion. Sodium (Na) is the counter ion, resulting in the formula Na[Ni(en)3C2O4].
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