coordination compounds

Question 1

What is linkage isomerism?

Answer 1

Ambident ligands that can link through 2 different donor atoms give rise to linkage isomerism. - NO2, CN, etc.
[Co(NH3)5NO2]2+ and
[Co(NH3)5ONO]2+

Question 2

What is ionization isomerism?

Answer 2

Same molecular formula, different ions in aqueous medium
[Co(NH3)5Cl]SO4 and
[Co(NH3)5SO4]Cl
–> first gives white ppt with BaNO3 and second gives white ppt with AgNO3

Question 3

What is coordination sphere isomerism?

Answer 3

Interchange of ligands between anionic and cationic identities
[Co(NH3)6][Cr(CN)6] and
[Cr(NH3)6][Co(CN)6]

Question 4

What is solvate isomerism?

Answer 4

Depending on number of solvent molecules getting attached to central metal atom, the molecular and structural formula may differ
[Co(H2O)6]Cl3 and
[Co(H2O)5Cl]Cl2.H2O
–> first is blue second is pink

Question 5

What type of isomerism is shown by [Co(en)2Cl2]+?

Answer 5

Geometrical & the cis isomer is optically active