In which of the following octahedral complexes of Co (At. no. 27), will the magnitude of Δ0 be the highest?

Question

In which of the following octahedral complexes of Co (At. no. 27), will the magnitude of Δ0 be the highest? (A) [Co(CN)6]3- (B) [Co(C2O4)3]3- (C) [Co(H2O)6]3+ (D) [Co(NH3)6]3+

Tardigrade Admin · Accepted Answer

Spectrochemical series. According to the strength of splitting is as :

CO > C N^{-} > N O_{2}^{-} > e n > N H_{3} > p y > NC S^{-}

> H_{2} O > O^{2 -} > o X^{2 -} > O H^{-} > F > C l^{-}

> SC N^{-} > S^{2 -} > B r^{-} > I^{-}

Crystal field stabilisation energy (CFSE) foroctahedral complex,

Δ^{\circ}

depends on the strengthof negative ligand. [Higher the strength morewill be the CFSE]

Q. In which of the following octahedral complexes of Co (At. no. 27), will the magnitude of $Δ_{0}$ be the highest?

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

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

$[C o (H_{2} O)_{6}]^{3 +}$

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

Q. In which of the following octahedral complexes of Co (At. no. 27), will the magnitude of Δ0​ be the highest?

[Co(CN)6​]3−

[Co(C2​O4​)3​]3−

[Co(H2​O)6​]3+

[Co(NH3​)6​]3+

Q. In which of the following octahedral complexes of Co (At. no. 27), will the magnitude of $Δ_{0}$ be the highest?

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

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

$[C o (H_{2} O)_{6}]^{3 +}$

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