Which of the following pairs corresponds to linkage ismerism ?

Options

A. `[Co(en)_(3)][Cr(CN)_(6)]` and `[Cr(en)_(3)][Co(CN)_(6)]`
B. `[Mn(CO)_(5)(SCN)]` and `[Mn(CO)_(5)(NCS)]`
C. `[Co(MH_(3))_(5)(NO_(3))]SO_(4)` and `[Co(NH_(3))_(5)(SO_(4))] NO_(3)`
D. `[Co(NH_(3))_(4) (H_(2)O)CI]CI_(2)` and `[Co(NH_(3))_(4)CI_(2)]CI.H_(2)O`

Answer

B

Explanation

Linkage isomerism arises in a coordination compound containing ambidentate ligand such as the thiocyanate ligand, `NSC^(-)` , which may bind either through the N to give `M-NCS` or through S to give `M-SCN` .
(1) Coordination isomerism, (3) Ionization isomerism and (4) Hydrate isomerism