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Q.
$\left[\left( C _{6} H _{5}\right)_{2} Pb ( SCN )_{2}\right]$ and $\left[\left( C _{6} H _{5}\right)_{2} Pb ( NCS )_{2}\right]$ are
Coordination Compounds
Solution:
$S$ atom is the donor in $SCN$ and $N$ atom is the donor in $NCS$. The linkage isomerism arises when the ligand has two possibilities to attach on central atom.