Number of stereoisomers possible for the complexes, and are respectively

( = pyridine, = oxalate)

Question

Number of stereoisomers possible for the complexes,  and  are respectively

( = pyridine,  = oxalate)

Canvas Classes · Accepted Answer

Strategy:
 Determine the specific geometry models for  (monodentate ligands) and a structural interpretation for the bidentate variant.

Step 1: Stereoisomers of 
This is an octahedral  complex.
- Geometrical Isomers: 2 (facial and meridional).
- Chirality: Both fac and mer isomers contain planes of symmetry. Thus, neither is optically active.
Total stereoisomers = 2.

Step 2: Stereoisomers of 
Correction to formula via standard interpretation: Because Cr(III) insists on a coordination number of

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