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  • Due to the presence of ambidentate ligands coordination compounds show isomerism. Palladium complexes of the type [{Pd}({C}_{6}{H}_{5})_{2}({SCN})_{2}] and [ {Pd}({C}_{6}{H}_{5})_{2}({NCS})_{2}] are

Due to the presence of ambidentate ligands coordination compounds show isomerism. Palladium complexes of the type \left [ \text {Pd}\left ( \text {C}_{6}\text {H}_{5} \right )_{2}\left ( \text {SCN} \right )_{2} \right ] and \left [ \text {Pd}\left ( \text {C}_{6}\text {H}_{5} \right )_{2}\left ( \text {NCS} \right )_{2} \right ] are

(i) linkage isomers

(ii) coordination isomers

(iii) ionisation isomers

(iv) geometrical isomers

Answers (1)

Option (i) is the correct answer.

Explanation: Ambident ligands are those ligands which have two different bonding sites. For example: \text {NCS,NO}_{2} etc.

In this case, \text {NCS} contains two binding sites at N and S. Therefore,  \text {NCS} (thiocyanate) will be bonding to the metal in these two ways; \text {M}\leftarrow \text {NCS} or \text {M}\rightarrow \text {SNC}

Hence, the coordination compounds containing  \text {NCS}  as ligands can show linkages isomerism;  \left [ \text {Pd}\left ( \text {C}_{6}\text {H}_{5} \right )_{2}\left ( \text {SCN} \right )_{2} \right ] and \left [ \text {Pd}\left ( \text {C}_{6}\text {H}_{5} \right )_{2}\left ( \text {NCS} \right )_{2} \right ] are linkage isomers.

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