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Define co-ordination number with example
Short answer
Coordination number is the number of ligand donor atoms directly bonded to the central metal ion. In [Co(NH₃)₆]³⁺ it is 6; in [Cu(en)₂]²⁺ it is 4.
Define the term co-ordination number with an example.
The coordination number of a central metal ion is the total number of ligand donor atoms directly bonded to it by coordinate bonds (the number of coordinate bonds formed). It equals Werner's secondary valency.
Examples:
- [Co(NH₃)₆]³⁺: coordination number 6.
- [Ni(CN)₄]²⁻: coordination number 4.
- [Cu(en)₂]²⁺: coordination number 4 (each en is bidentate, two donor atoms).
✓ Answer checked by Claude Opus 5.5 (high effort)
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