Q.

Type of isomerism exhibited by compounds [Cr(H2O)6]Cl3, [Cr(H2O)5Cl]Cl2.H2O, [Cr(H2O)4Cl2]Cl.2H2O and the value of coordination number (CN) of central metal ion in all these compounds, respectively is            [2023]

1 geometrical isomerism, CN = 2  
2 optical isomerism, CN = 4  
3 ionisation isomerism, CN = 4  
4 solvate isomerism, CN = 6  

Ans.

(4)

The isomers that exhibit solvate isomerism have the same composition but differ with respect to the number of solvent ligand molecules as well as the counter ion in the crystal lattice.

Given complex compounds exhibit solvate isomerism and the coordination number of central metal ion is 6.