Total number of relatively more stable isomer(s) possible for octahedral complex will be

Question

Total number of relatively more stable isomer(s) possible for octahedral complex  will be

Canvas Classes · Accepted Answer

Strategy:
 Draw out the possible isomers of . Consider both geometrical arrangement and linkage isomerism of the  group. Then, apply Hard-Soft Acid-Base (HSAB) theory to determine the most stable binding mode.

Step 1: Identify geometric possibilities
The complex is of the type .
It can exist in two geometrical isomeric forms:
- trans isomer
- cis isomer

Step 2: Identify linkage possibilities
Thiocyanate () is an ambidentate ligand:
- Bonded via Nitrogen: Isothiocyanato (), a hard donor.
- Bond

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