Answer:
[Co(H2O)3(CO)3]3+
Explanation:
If an octahedral specie has the general formula EX3Y3, the X groups may be arranged to be on one face of the octahedron and the Y groups may also be arranged to be on the other face of the octahedron or lie in the plane of the central atom.
The two stereo isomers described above are called fac (facial) and mer (meridional) isomers.
Only [Co(H2O)3(CO)3]3+ can exhibit this type of isomerism among the options in the questions since it has the general formula, EX3Y3.
The compound that can exhibit fac-mer isomerism is [Co(H₂O)₃(CO)₃]³⁺. The correct option is E. [Co(H2O)3(CO)3]3+
From the question,
We are to determine which of the listed compounds can exhibit fac-mer isomerism
First, we will define the term fac-mer isomerism
Fac-mer isomerism is short for facial and meridional isomerism. This type of isomerism occurs when there are two equal types of ligand in an octahedral metal complex.
Fac isomerism occurs when three identical ligands occupy one face of an octahedron
Mer isomerism occurs when each set of identical ligands occupy a plane of the octahedron
Among the listed compounds, the compound that has two equal types of ligand is [Co(H₂O)₃(CO)₃]³⁺
Hence, the compound that can exhibit fac-mer isomerism is [Co(H₂O)₃(CO)₃]³⁺. The correct option is E. [Co(H2O)3(CO)3]3+
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