Question

What kind of isomerism exists between $[Cr(H_{2}O)_{6}]Cl_{3}$ (violet) and $[Cr(H_{2}O )_{5}Cl]Cl_{2}\cdot H_{2}O$ (greyish-green)?

• A. Linkage isomerism
• B. Solvate isomerism
• C. Ionisation isomerism
• D. Coordination isomerism

Answer 1

Answer: (B)

Solvate isomerism

Answer 2

This form of isomerism is known as 'hydrate isomerism' in case where water is involved as a solvent. This is similar to ionisation isomerism. Solvate isomers differ by whether or not a solvent molecule is directly bonded to the metal ion or merely present as free solvent molecules in the crystal lattice.