Question:
The coordination number of a central metal atom in a complex is determined by
The coordination number of a central metal atom in a complex is determined by
Updated On: Aug 15, 2022
- the number of ligands around a metal ion bonded by sigma bonds
- the number of ligands around a metal ionbonded pi-bonds
- the number of ligands around a metal ionbonded by sigma and pi-bonds
- the number of only anionic ligands bondedto the metal ion
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The Correct Option is A
Solution and Explanation
The co-ordination number of a central metal atom in a complex is determined by the number of ligands around a metal ion bonded by sigma bonds. It is also define as the number of atoms, ions, or molecules that a central atom or ion holds as its nearest neighbors in a complex. For example, in $Ni ( CO )_{4}$, four carbonyl ligands are bonded to Ni atom. Hence, the coordination number of $Ni$ in $Ni ( CO )_{4}$ is four.
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Concepts Used:
Coordination Compounds
A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.
Coordination entity:
A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.
Ligands:
A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.