What is the meaning of denticity of ligands?
The denticity of the ligand is defined as the number of pairs of electrons shared with the metal atom or ion.
Ligands can be classified as monodentate and polydentate ligands depending upon the number of ligand donor atoms that attach to the metal atom or ion.
Table of Contents
- Monodentate ligands
- Bidentate ligands
- Tridentate ligands
- Tetradentate ligands
- Pentadentate ligands
- Hexadentate ligands
- Frequently asked questions
A ligand which shares an electron pair of a single donor atom with a metal atom or ion is called monodentate ligand. The common monodentate ligands are shown below:
|Negative ligands||Name as ligand|
These ligands have two donor atoms which can attach to a single metal cation or atom. A bidentate ligand forms one 5- or 6- membered ring with a metal ion. Some examples of bidentate ligands are.
|Bidentate ligands||Name as ligand|
Note: The ligands like CO32-, NO2-, NO3-, NCS- etc. have two donor atoms but in general, they act as monodentate ligands. They form four or three membered rings including metal cation or atoms there will be repulsion between donor atoms and their electron pairs which causes the ring to be stained and hence unstable.
These ligands have three donor atoms which can attach to a single metal cation or atom. Some examples of tridentate ligands are.
These ligands have four donor atoms which can attach to a single metal cation or atom. Some examples of tetradentate ligands are
These ligands have five donor atoms which can attach to a single metal cation or atom. Some examples of pentadentate ligands are
These ligands have six donor atoms which can attach to a single metal cation or atom. Some examples of hexadentate ligands are
Frequently Asked Questions -FAQs
1. How do you find the denticity of a ligand?
Denticity of a ligand is the no. of lone pairs donated to the central metal atom or ion by a ligand atom or molecule. Ligands can be classified as monodentate and polydentate ligands depending upon the number of ligand donor atoms that attach to the metal atom or ion.
2. What is the denticity of EDTA ligand?
The denticity of ethylenediaminetetraacetate (EDTA) is six.
3. What denticity Is the oxalate ligand?
The denticity of oxalate ligand is two. It is a bidentate ligands.
4. What is the denticity of ethylenediamine?
The denticity of ethylenediamine is two. It is a bidentate ligands.
5. Is bipyridine a neutral ligand?
Bipyridine is a neutral ligand having density two.