Question

The coordination number and geometry of \([\mathrm{Ni(CN)_4]^{2-}\) and \([\mathrm{NiCl_4}]^{2-}\) are respectively:}

• A. 4, square planar and 4, tetrahedral
• B. 4, tetrahedral and 4, square planar
• C. 6, octahedral and 6, octahedral
• D. 4, square planar and 6, octahedral

Hint:

Strong field ligands favor square planar geometry for Ni(II).

Answer 1

The Correct Option is A

CN\(^{-}\) is a strong field ligand giving square planar complex, Cl\(^{-}\) is a weak field ligand giving tetrahedral complex.