All of the following complexes are low-spin except A) Co(CN)₆³^-. B) Co(NH₃)₆³⁺. C) Rh(NH₃)₆³⁺. D) Co(en)₃³⁺. E) CoCl₄²^-.

Name: All of the following complexes are low-spin except A) Co(CN) 6 3 - . B) Co(NH 3 ) 6 3+ . C) Rh(NH 3 ) 6 3+ . D) Co(en) 3 3+ . E) CoCl 4 2 - .
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Question

Quizplus · Accepted Answer

CoCl$_4^{2-}$ is a high-spin complex because Cl$^-$ is a weak field ligand, which does not cause significant pairing of electrons in the d orbitals, leading to a high-spin configuration.

All of the Following Complexes Are Low-Spin Except