Question

Is water a ligand?

Answer 1

Water is a weak field ligand.

Ligand: The species which tends to give electrons to establish a coordination bond to the metal atom in a coordination compound is called a ligand.

1. The type or quantity of donor atoms that a molecule contains could be used to categorize the ligands.
2. Monodentate ligands are substances with only one donor atom and the ability to accept electrons from just one location.
3. Or, to put it another way, monodentate ligands are ligands that directly establish a single coordinate bond with the central metal atom.
4. For instance, monodentate ligands include ammonia or chloride ions.
5. The term "bidentate ligand" refers to ligands that have multiple atoms that can covalently bind to a metal atom. Consider ethylene diamine.
6. Since the oxygen in water has one pair of electrons, it is a type of monodentate ligand.
7. As a result of having two lone pairs of electrons available, water may appear to be divalent, although a bidentate ligand should have two separate donor atoms.
8. The density of water is,

Temperature	Density in kg/m3
100 °C	958.4
80 °C	971.8
60 °C	983.2
40 °C	992.2
30 °C	995.65
25 °C	997.04
22 °C	997.77
20 °C	998.2
15 °C	999.1
10 °C	999.70
4 °C	998.97
0 °C	999.83
-10 °C	998.12
-20 °C	993.547
-30 °C	983.854

Hence, water is a ligand.