Iupac Nomenclature
What is the correct IUPAC name of [Cr(NH3)4Cl2]Cl?
Select the correct option:
Solution
Tetraamminedichlorochromium(III) chloride
- Oxidation State Determination: Let x be the oxidation state of Cr. Ammonia (NH3) is neutral (0), and Chlorine (Cl) is −1.
- x+4(0)+2(−1)=+1 (due to the external Cl− ion).
- x−2=+1⟹x=+3. The metal is Chromium(III).
- Naming Ligands:
- 4 Ammonia molecules → tetraammine (alphabetically first).
- 2 Chlorine molecules within the sphere → dichloro.
- Metal Name: Since the complex cation is positive, we use the standard name chromium.
- Counter Ion: The external Cl− is named chloride.
- Final Name: Tetraamminedichlorochromium(III) chloride.
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
More iupac nomenclature Practice Questions
A chemist isolates a four-carbon straight chain bearing an aldehyde group at one terminal carbon; wh...
A chemist isolates a four-carbon straight chain bearing an aldehyde group at one terminal carbon; wh...
According to IUPAC rules for naming coordination compounds, what is the correct systematic name of t...
According to IUPAC rules for naming coordination compounds, what is the correct systematic name of t...
What is the correct IUPAC name of the compound CH₃–CH(OH)–CH₂–CH₃?
What is the correct IUPAC name of the compound CH₃–CH(OH)–CH₂–CH₃?
The IUPAC name of CH₃-CH(CH₃)-CH₂-CH₃ is:
The IUPAC name of CH₃-CH(CH₃)-CH₂-CH₃ is:
The IUPAC name of [Pt(NH₃)₂Cl₂] is:
The IUPAC name of [Pt(NH₃)₂Cl₂] is:
About This Question
- Subject
- chemistry
- Chapter
- coordination compounds
- Topic
- iupac nomenclature
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Tetraamminedichlorochromium(III) chloride
- Oxidation State Determination: Let x be the oxidation state of Cr. Ammonia (NH3) is neutral (0), and Chlorine (Cl) is −1.
- x+4(0)+2(−1)=+1 (due to the external Cl− ion).
- x−2=+1⟹x=+3. The metal is Chromium(III).
- Naming Ligands:
- 4 Ammonia molecules → tetraammine (alphabetically first).
- 2 Chlorine molecules within the sphere → dichloro.
- Metal Name: Since the complex cation is positive, we use the standard name chromium.
- Counter Ion: The external Cl− is named chloride.
- Final Name: Tetraamminedichlorochromium(III) chloride.
This easy difficulty chemistry question is from the chapter coordination compounds, covering the topic of iupac nomenclature. It appeared in the 2025 exam.
Looking for more practice? Explore all chemistry questions or browse coordination compounds questions on RankGuru.