Question

Which of the following statement is/are false?

• A. $\left[ Ni ( CO )_4\right]$ is high spin complex
• B. Weak ligands like $F ^{-}, Cl ^{-}$and $OH ^{-}$usually form low spin complexes
• C. $\left[ FeF _6\right]^{3-}$ is high spin complex
• D. Strong ligand like $CN ^{-}$and $NO _2^{-}$, generally form high spin complexes

Answer 1

Answer: (A), (B), (D)

$F ^{-}, Cl ^{-}$and $OH ^{-}$are weak field ligands usually form high spin complexes. $CN _2^{-}$and $NO _2^{-}$are strong field ligands usually form low spin complexes, $\left[ Ni ( CO )_4\right]$ is low spin complex