In a square planar complex with identical ligands, what is the arrangement of ligands in the trans isomer?

Question

ScanSolve AI Tutor · Accepted Answer

The question asks about the arrangement of identical ligands in the trans isomer of a square planar complex.

Understand square planar geometry and isomerism.
In a square planar complex, the central metal atom and four ligands lie in the same plane. Geometric isomerism (cis-trans isomerism) occurs when identical ligands can be arranged in different positions relative to each other.
Define trans isomer.
The trans isomer is characterized by identical ligands being positioned as far apart as possible from each other. In a square planar geometry, this means they are at 180 degrees to each other.
Evaluate the given options.
- A. Diametrically opposite each other: This means the ligands are 180 degrees apart, which is the definition of a trans isomer.
- B. On the same side: This is vague but generally implies adjacency.
- C. Adjacent to each other: This means the ligands are 90 degrees apart, which describes a cis isomer.
- D. In axial positions: Square planar complexes do not have axial positions; this term is typically used for octahedral or trigonal bipyramidal geometries.
The correct option is A.

The final answer is $\boxed{\text{A. Diametrically opposite each other}}$

Answer