Arrange the given metal ions in increasing order of number of unpaired electrons in the low spin complexes formed by \( \text{Mn}^{3+}, \text{Cr}^{3+}, \text{Fe}^{3+}, \text{Co}^{3+} \)
The structure of the major product formed in the following reaction is:

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.
A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.
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.