Question

Due to the presence of ambidenate ligands coordination compounds show isomerism. Palladium complexes of the type `[Pd(C_(6)H_(5))_(2)(SCN)_(2)]` & `[Pd(C_(6)H_(5))_(2)(NCS)_(2)]` are
A. linkage isomers
B. Coordination isomers
C. ionisation isomers
D. geometrical isomers

Answer 1

Correct Answer - A
The ligand(s) which has two different bonding sites are known as ambident ligands e.g., `NCS, NO_(2)` etc.
Here, `NCS` has two binding sites at N and S.
Hence, `NCS` (thiocyanate) can bind to the metal ion in two ways
`M larr NCS or M rarr SNC`
Thus, coordination compounds containing NCS as a ligand can show linkage isomerism i.e., `[Pd(C_(6)H_(5))_(2) (SCN)_(2)]` and `[Pb(C_(6)H_(5))_(2)(NCS)_(2)]` are linkage isomers.
Hence, correct choice is (a).