Which of the following complexes is example of strongest reducing agent?

Question

Which of the following complexes is example of strongest reducing agent? (A) [ Co ( CN )6]4- (B) [ Co ( CN )6]3- (C) [ Ag ( CN )2]- (D) [ Cu ( CN )4]3-

Tardigrade Admin · Accepted Answer

All the complexes of Co 2+ with six strong field ligands act as strong reducing agents. Also, [ Co ( NH 3)6]2+ is readily oxidised to [ Co ( NH 3)6]3+ due to higher CFSE value of d 6 configuration.

Q. Which of the following complexes is example of strongest reducing agent?

$[C o (CN)_{6}]^{4 -}$

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

$[A g (CN)_{2}]^{-}$

$[C u (CN)_{4}]^{3 -}$

All the complexes of $C o^{2 +}$ with six strong field ligands act as strong reducing agents. Also, $[C o (N H_{3})_{6}]^{2 +}$ is readily oxidised to $[C o (N H_{3})_{6}]^{3 +}$ due to higher $CFSE$ value of $d^{6}$ configuration.

Q. Which of the following complexes is example of strongest reducing agent?

[Co(CN)6​]4−

[Co(CN)6​]3−

[Ag(CN)2​]−

[Cu(CN)4​]3−

All the complexes of Co2+ with six strong field ligands act as strong reducing agents. Also, [Co(NH3​)6​]2+ is readily oxidised to [Co(NH3​)6​]3+ due to higher CFSE value of d6 configuration.

$[C o (CN)_{6}]^{4 -}$

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

$[A g (CN)_{2}]^{-}$

$[C u (CN)_{4}]^{3 -}$

All the complexes of $C o^{2 +}$ with six strong field ligands act as strong reducing agents. Also, $[C o (N H_{3})_{6}]^{2 +}$ is readily oxidised to $[C o (N H_{3})_{6}]^{3 +}$ due to higher $CFSE$ value of $d^{6}$ configuration.