Draw all geometrical and linkage isomers of square planar \(\operatorname{Pt}\left(\mathrm{NH}_{3}\right)_{2}(\mathrm{SCN})_{2}\) .

Geometrical isomers occur in coordination complexes when the ligands are arranged differently around the central metal atom. In square planar complexes, geometrical isomers are typically classified as either "cis" (adjacent) or "trans" (opposite) based on the relative positions of the ligands. Linkage isomers occur when a ligand has multiple atomic sites capable of coordinating with the central metal atom. In this exercise, the thiocyanate ligand (SCN) can bind to the platinum through either the sulfur (S) or nitrogen (N) atom, creating linkage isomers.

For the square planar Pt(NH3)2(SCN)2 complex, there are two possible geometrical isomers: cis and trans. 1. Cis isomer: Both the SCN ligands are adjacent to each other around the platinum atom. The ammonia(NH3) ligands are also adjacent to each other. Draw the cis isomer as follows: - Place the Pt atom in the center - Add SCN ligands to the top and right positions (or any two adjacent positions) - Add NH3 ligands to the bottom and left positions (or the remaining two adjacent positions) 2. Trans isomer: The SCN ligands are opposite each other around the platinum atom. The ammonia(NH3) ligands are also opposite each other. Draw the trans isomer as follows: - Place the Pt atom in the center - Add SCN ligands to the top and bottom positions (or any two opposite positions) - Add NH3 ligands to the left and right positions (or the remaining two opposite positions)

The thiocyanate (SCN) ligand can bind to the platinum through either the sulfur (S) or nitrogen (N) atom, creating linkage isomers. There are four linkage isomers for this complex: 1. Cis isomer with both S atoms bound to Pt: - Draw the cis geometrical isomer - Indicate that the S atoms of the SCN ligands are bound to Pt 2. Cis isomer with both N atoms bound to Pt: - Draw the cis geometrical isomer - Indicate that the N atoms of the SCN ligands are bound to Pt 3. Trans isomer with both S atoms bound to Pt: - Draw the trans geometrical isomer - Indicate that the S atoms of the SCN ligands are bound to Pt 4. Trans isomer with both N atoms bound to Pt: - Draw the trans geometrical isomer - Indicate that the N atoms of the SCN ligands are bound to Pt Overall, there are four isomers for the square planar Pt(NH3)2(SCN)2 complex, encompassing both geometrical and linkage isomers.