Coordination Number
Coordination number of Pt in [PtCl2(NH3)2] is:
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About This Question
- Subject
- chemistry
- Chapter
- coordination compounds
- Topic
- coordination number
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
4
- Definition: The coordination number (CN) is the total number of coordinate bonds formed between the central metal atom and the ligands.
- Ligand Denticity:
- Chlorine (Cl−) is a monodentate ligand (forms 1 bond).
- Ammonia (NH3) is a monodentate ligand (forms 1 bond).
- Calculation:
- 2×1 (for Cl) + 2×1 (for NH3).
- Total Bonds = 2+2=4.
- Geometry: For CN=4, Pt usually adopts a square planar geometry.
This easy difficulty chemistry question is from the chapter coordination compounds, covering the topic of coordination number. It appeared in the 2025 exam.
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