What is the hybridization and magnetic property of the tetracyanidonickelate(II) ion, ? (Atomic number of )
Answer and explanation
Correct answer: A. , diamagnetic
- Step 1: Nickel in is in the oxidation state: has the electronic configuration .
- Step 2: Cyanide () is a strong field ligand that forces the two unpaired electrons in the subshell to pair up, leaving one vacant orbital.
- Step 3: The empty , , and two orbitals hybridize to form four equivalent hybrid orbitals with square planar geometry. With no unpaired electrons, the complex is diamagnetic.
Answer
, diamagnetic.
Why not the others: , paramagnetic corresponds to with weak field chloride ligands; , diamagnetic is geometrically contradictory; , paramagnetic has coordination number 6.
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