What is the name for the coordination compound [(CH3OH)2Ce(NO3)4]?
Coordination Compound: [(CH3OH)2Ce(NO3)4]
Introduction:
Coordination compounds are complex substances composed of a central metal ion or atom surrounded by ligands. Ligands are molecules or ions that donate electrons to the metal ion, forming coordinate bonds. These compounds have a wide range of applications in various fields including medicine, industry, and catalysis.
Name of the Coordination Compound:
The coordination compound [(CH3OH)2Ce(NO3)4] consists of a central cerium (Ce) ion surrounded by four nitrate (NO3-) ligands and two methanol (CH3OH) ligands. To name this compound, we need to follow the IUPAC nomenclature rules for coordination compounds.
Naming Process:
1. Identify the central metal ion: In this case, the central metal ion is cerium (Ce).
2. Identify the ligands: The ligands in this compound are nitrate (NO3-) and methanol (CH3OH).
3. Name the ligands:
- Nitrate (NO3-) is a polyatomic anion. Its name remains unchanged.
- Methanol (CH3OH) is a neutral molecule. Its name is modified to end in "-o" and is considered as a ligand called "methoxide".
4. Determine the oxidation state of the central metal ion:
- In this compound, the oxidation state of cerium (Ce) can be calculated by considering the charge of the ligands and the overall charge of the coordination compound.
- The nitrate ligands are negatively charged and each has a charge of -1. Since there are four nitrate ligands, the total charge contributed by nitrate is -4.
- The overall charge of the coordination compound is zero, indicating that the cerium ion must have a +4 oxidation state.
5. Write the name in the following order:
- Start with the names of ligands in alphabetical order, followed by the name of the central metal ion.
- Use Greek prefixes to indicate the number of ligands if there is more than one of the same type.
- Use Roman numerals to indicate the oxidation state of the central metal ion.
Name of the Compound:
Based on the above steps, the name of the coordination compound [(CH3OH)2Ce(NO3)4] is "bis(methanol)(tetranitrato)cerium(IV)".
Conclusion:
The coordination compound [(CH3OH)2Ce(NO3)4] is named as "bis(methanol)(tetranitrato)cerium(IV)" according to the IUPAC nomenclature rules. The name indicates the presence of two methanol ligands, four nitrate ligands, and a cerium ion with a +4 oxidation state.
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