Which of the following is a high spin complex?

Question

Which of the following is a high spin complex? (A) [ Co ( NH 3)6]3+ (B) [ Fe ( CN )6]4- (C) [ Ni ( CN )4]2- (D) [ FeF 6]3-

Tardigrade Admin · Accepted Answer

The complex [ FeF 6]4- is paramagnetic and uses outer orbital (4d) in hybridisation ( sp 3 d 2); it is thus called as outer orbital or high spin or spin free complex. So: <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/1fe34eccf4d1646a895cdc4240a33236-.png" /> sp 3 d 2 hybrid orbitals Six pairs of electrons from six F -ions.

Q. Which of the following is a high spin complex?

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

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

$[N i (CN)_{4}]^{2 -}$

$[F e F_{6}]^{3 -}$

The complex $[F e F_{6}]^{4 -}$ is paramagnetic and uses outer orbital (4d) in hybridisation $(s p^{3} d^{2})$ ; it is thus called as outer orbital or high spin or spin free complex. So :

$s p^{3} d^{2}$ hybrid orbitals
Six pairs of electrons from six $F^{-}$ ions.

Q. Which of the following is a high spin complex?

[Co(NH3​)6​]3+

[Fe(CN)6​]4−

[Ni(CN)4​]2−

[FeF6​]3−

The complex [FeF6​]4− is paramagnetic and uses outer orbital (4d) in hybridisation (sp3d2); it is thus called as outer orbital or high spin or spin free complex. So : sp3d2 hybrid orbitals Six pairs of electrons from six F−ions.

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

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

$[N i (CN)_{4}]^{2 -}$

$[F e F_{6}]^{3 -}$

The complex $[F e F_{6}]^{4 -}$ is paramagnetic and uses outer orbital (4d) in hybridisation $(s p^{3} d^{2})$ ; it is thus called as outer orbital or high spin or spin free complex. So :

$s p^{3} d^{2}$ hybrid orbitals
Six pairs of electrons from six $F^{-}$ ions.