In which of the following coordination entities the magnitude of Δ0 (CFSE in octahedral field) will be maximum? (At. no. of Co = 27)

Question

In which of the following coordination entities the magnitude of Δ0 (CFSE in octahedral field) will be maximum? (At. no. of Co = 27) (A) [ Co ( H 2 O )6]3+ (B) [ Co ( NH 3)6]3+ (C) [Co (CN)6]3- (D) [Co(C2O4)3]3-

Tardigrade Admin · Accepted Answer

As in all the given complex the central metal atom is same and contains same number of d electrons, thus CFSE is decided by ligands. In case of strong field ligand, CFSE is maximum. CN - is a strong field ligand, is maximum. The magnitude of Δ textoct will be maximum in [ Co ( CN )6]3-.Hence, in [ Co ( CN )6]3- CFSE

Q. In which of the following coordination entities the magnitude of $Δ_{0}$ ( $CFSE$ in octahedral field) will be maximum? (At. no. of $C o = 27$ )

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

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

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

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

Q. In which of the following coordination entities the magnitude of Δ0​ (CFSE in octahedral field) will be maximum? (At. no. of Co=27)

[Co(H2​O)6​]3+

[Co(NH3​)6​]3+

[Co(CN)6​]3−

[Co(C2​O4​)3​]3−

Q. In which of the following coordination entities the magnitude of $Δ_{0}$ ( $CFSE$ in octahedral field) will be maximum? (At. no. of $C o = 27$ )

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

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

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

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