Which one of the following complexes is an outer orbital complex?

Question

Which one of the following complexes is an outer orbital complex? (A)  [Fe(CN)6]4-  (B)  [Mn(CN)6]4-  (C)  [Co(NH3)6]3+  (D)  [Ni(NH3)6]2+ (Atomic numbers Mn=25, text Fe=26, text Co=27, Ni=28 )

Tardigrade Admin · Accepted Answer

(a) (b) (c) (d) In this case also NH3 is a strong ligand but electrons remain unpaired since only one orbital is left vacant in 3d . Thus

Q. Which one of the following complexes is an outer orbital complex?

$[F e (CN)_{6}]^{4 -}$

$[M n (CN)_{6}]^{4 -}$

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

$[N i (N H_{3})_{6}]^{2 +}$ (Atomic numbers $M n = 25, F e = 26, C o = 27,$ $N i = 28$ )

(a)
(b)
(c)
(d)
In this case also $N H_{3}$ is a strong ligand but electrons remain unpaired since only one orbital is left vacant in $3 d$ . Thus

Q. Which one of the following complexes is an outer orbital complex?

[Fe(CN)6​]4−

[Mn(CN)6​]4−

[Co(NH3​)6​]3+

[Ni(NH3​)6​]2+ (Atomic numbers Mn=25,Fe=26,Co=27, Ni=28 )

(a) (b) (c) (d) In this case also NH3​ is a strong ligand but electrons remain unpaired since only one orbital is left vacant in 3d . Thus

$[F e (CN)_{6}]^{4 -}$

$[M n (CN)_{6}]^{4 -}$

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

$[N i (N H_{3})_{6}]^{2 +}$ (Atomic numbers $M n = 25, F e = 26, C o = 27,$ $N i = 28$ )

(a)
(b)
(c)
(d)
In this case also $N H_{3}$ is a strong ligand but electrons remain unpaired since only one orbital is left vacant in $3 d$ . Thus