The complex which has facial (fac) and meridi | vedclass

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Question

(A) Facial $(fac)$ and meridional $(mer)$ isomerism is a type of geometric isomerism observed in octahedral complexes with the general formula $[MA_3B

Vedclass · Accepted Answer

$[Cr(py)_3(Cl)_3]$

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(A) Facial $(fac)$ and meridional $(mer)$ isomerism is a type of geometric isomerism observed in octahedral complexes with the general formula $[MA_3B_3]$.In the $fac$ isomer, the three identical ligands occupy the corners of one triangular face of the octahedron.In the $mer$ isomer, the three identical ligands occupy the meridian of the octahedron.Among the given options, $[Cr(py)_3(Cl)_3]$ and $[Co(NH_3)_3(H_2O)_3]^{3+}$ both follow the $[MA_3B_3]$ pattern. However, $[Cr(py)_3(Cl)_3]$ is the classic example provided in textbooks for $fac-mer$ isomerism. $[Co(NH_3)_3(H_2O)_3]^{3+}$ also exhibits this isomerism. Given the standard options, $[Cr(py)_3(Cl)_3]$ is the most frequently cited example for this specific coordination geometry.

The complex which has facial $(fac)$ and meridional $(mer)$ isomers is
(Given: $py = \text{pyridine}$ and $en = H_2N-CH_2-CH_2-NH_2$)

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The complex which has facial $(fac)$ and meridional $(mer)$ isomers is(Given: $py = \text{pyridine}$ and $en = H_2N-CH_2-CH_2-NH_2$)