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easyMCQAIEEE 20042026Chemistry
1 mark

The coordination number of the central metal atom in a complex is determined by:

  1. A
    the number of ligands around a metal ion bonded by sigma bonds
  2. B
    the number of only anionic ligands bonded to the metal ion
  3. C
    the number of ligands around a metal ion bonded by sigma and pi bonds both
  4. D
    the number of ligands around a metal ion bonded by pi bonds

Solution & Step-by-step Explanation

The coordination number is defined as the total number of sigma bonds formed by the ligands with the central metal ion. Pi bonds formed via back-bonding or multiple bonding are not counted toward the coordination number.

Practice this question

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The coordination number of the central metal atom in a complex is determined by:
A
the number of ligands around a metal ion bonded by sigma bonds
B
the number of only anionic ligands bonded to the metal ion
C
the number of ligands around a metal ion bonded by sigma and pi bonds both
D
the number of ligands around a metal ion bonded by pi bonds

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