Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE) value.
Complexes: $\begin{matrix} \underset{A}{{[{CoF}_{6}]}^{3 -}}, & \underset{B}{{[Co {(H_{2} O)}_{6}]}^{2 +}}, & \underset{C}{{[Co {({NH}_{3})}_{6}]}^{3 +}} and \underset{D}{{[Co (en)_{3}]}^{3 +}} \end{matrix}$
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Question

Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE) value.

Complexes: $\begin{matrix} \underset{A}{{[{CoF}_{6}]}^{3 -}}, & \underset{B}{{[Co {(H_{2} O)}_{6}]}^{2 +}}, & \underset{C}{{[Co {({NH}_{3})}_{6}]}^{3 +}} and \underset{D}{{[Co (en)_{3}]}^{3 +}} \end{matrix}$

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Aicharya · Accepted Answer

CFSE &#8733; Strength of ligand &#160; en &#62; NH 3 &#62; H 2 O &#62; F - CFSE &#8733; Oxidation number of the central metal. &#8756; Order of CFSE Co H 2 O 6 2 + &#60; CoF 6 3 - &#60; Co NH 3 6 3 + &#60; Co ( en ) 3 3 +

Arrange the following Cobalt complexes in the order of increasing Crystal Field Stabilization Energy (CFSE)…

Solution