Choose the incorrect stability order.

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Question

(B) The stability increases with the chelate effect as the denticity of the ligand increases ($NH_3$ is monodentate,$en$ is bidentate,$trien$ is tetra

Vedclass · Accepted Answer

$[Fe(H_2O)_6]^{3+}  <  [Fe(NH_3)_6]^{3+}  <  [Fe(NO_2)_6]^{3-}$

Vedclass · Answer

(B) The stability increases with the chelate effect as the denticity of the ligand increases ($NH_3$ is monodentate,$en$ is bidentate,$trien$ is tetradentate). This order is correct.$(b)$ The stability of a complex depends on the field strength of the ligand. $NO_2^-$ is a stronger field ligand than $NH_3$. Therefore,the correct order should be $[Fe(H_2O)_6]^{3+}  $(c)$ For the same group,stability increases down the group due to the increase in crystal field splitting energy $(\Delta_o)$ as $Z_{eff}$ increases from $Co^{3+}$ to $Ir^{3+}$. This order is correct.$(d)$ Stability increases with the increase in the oxidation state of the central metal ion due to stronger electrostatic attraction. This order is correct.

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