In which of the following octahedral complex species the magnitude of Δo will be maximum ?

Question

In which of the following octahedral complex species the magnitude of Δo will be maximum ? (A) [Co (H2O)6]2+ (B) [Co (CN)6]3- (C) [Co (C2O4)3]3- (D) [Co(NH3)6]3+

Tardigrade Admin · Accepted Answer

Crystal field splitting depends upon the nature of ligand. The nature of ligand Δ decreases as shown below C2O4 -< H2O < NH3 < CN- hence the crystal field splitting will be maximum for [Co (CN)6]3-

Q. In which of the following octahedral complex species the magnitude of $Δ_{o}$ will be maximum ?

$[C o (H_{2} O)_{6}]^{2 +}$

$[C o (CN)_{6}]^{3 -}$

$[C o (C_{2} O_{4})_{3}]^{3 -}$

$[C o (N H_{3})_{6}]^{3 +}$

Crystal field splitting depends upon the nature of ligand. The nature of ligand $Δ$ decreases as shown below
$C_{2} O_{4} - < H_{2} O < N H_{3} < C N^{-}$
hence the crystal field splitting will be maximum for $[C o (CN)_{6}]^{3 -}$

Q. In which of the following octahedral complex species the magnitude of Δo​ will be maximum ?

[Co(H2​O)6​]2+

[Co(CN)6​]3−

[Co(C2​O4​)3​]3−

[Co(NH3​)6​]3+