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(D) The crystal field splitting energy $(\Delta_{0})$ increases down a group in the periodic table for metal ions with the same charge and same ligand

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$[Os(H_{2}O)_{6}]^{3+}$

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(D) The crystal field splitting energy $(\Delta_{0})$ increases down a group in the periodic table for metal ions with the same charge and same ligand environment.This is because the $d$-orbitals of the $5d$ series elements are more extended in space compared to the $3d$ and $4d$ series,leading to stronger interaction with the ligands.Among the given complexes,$Cr^{3+}$ $(3d)$,$Mo^{3+}$ $(4d)$,$Fe^{3+}$ $(3d)$,and $Os^{3+}$ $(5d)$ are present.Since $Os$ belongs to the $5d$ series,the complex $[Os(H_{2}O)_{6}]^{3+}$ will have the highest $\Delta_{0}$ value.

The transition metal complex with the highest value of crystal field splitting $(\Delta_{0})$ is ........ .

Similar Questions

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Which among the following is a correct order of increasing field strength of ligands?

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