Question:
The pair(s) of complexes wherein both exhibit tetrahedral geometry is(are)
(Note: py = pyridine, Given: Atomic numbers of Fe, Co, Ni and Cu are 26, 27, 28 and 29, respectively)
The pair(s) of complexes wherein both exhibit tetrahedral geometry is(are)
(Note: py = pyridine, Given: Atomic numbers of Fe, Co, Ni and Cu are 26, 27, 28 and 29, respectively)
(Note: py = pyridine, Given: Atomic numbers of Fe, Co, Ni and Cu are 26, 27, 28 and 29, respectively)
Updated On: May 23, 2024
\([FeCl_4]^{-} \quad \text{and} \quad [Fe(CO)_4]^{2-}\)
\([Co(CO)_4]^{-} \quad \text{and} \quad [CoCl_4]^{2-}\)
\([Ni(CO)_4] \quad \text{and} \quad [Ni(CN)_4]^{2-}\)
\([Cu(py)_4]^{+} \quad \text{and} \quad [Cu(CN)_4]^{3-}\)
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The Correct Option is A, B, D
Solution and Explanation
[FeCl4]– → Fe3+, 3d5 (weak field ligand) = sp3
[Fe(CO)4]–2 → Fe2–, 3d10 →sp3
[Co(CO)4]– → Co–, 3d10 → sp3
[CoCl4]2– → Co2+, 3d7 (weak field ligand) → sp3
[Ni(CO)4] → Ni, 3d10 → sp3
[Ni(CN)4]2– → Ni2+, 3d8 (strong field ligand) → dsp2
[Cu(py)4]+ → Cu+, 3d10 →sp3
[Cu(CN)4]3– → Cu+, 3d10 → sp3
In 3d10 electronic configuration, only sp3 hybridisation and tetrahedral geometry are possible.
[Fe(CO)4]–2 → Fe2–, 3d10 →sp3
[Co(CO)4]– → Co–, 3d10 → sp3
[CoCl4]2– → Co2+, 3d7 (weak field ligand) → sp3
[Ni(CO)4] → Ni, 3d10 → sp3
[Ni(CN)4]2– → Ni2+, 3d8 (strong field ligand) → dsp2
[Cu(py)4]+ → Cu+, 3d10 →sp3
[Cu(CN)4]3– → Cu+, 3d10 → sp3
In 3d10 electronic configuration, only sp3 hybridisation and tetrahedral geometry are possible.
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Concepts Used:
Coordination Compounds
A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.
Coordination entity:
A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.
Ligands:
A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.