Coordination CompoundHard

Question

The crystal field-splitting for Cr3+ ion in octahedral field changes for ligands I-, H2O, NH3, CN- and the increasing order is :

Options

A.I- < H2O < NH3 < CN-
B.CN- < I- < H2O < NH3
C.CN- < NH3 < H2O < I-
D.NH3 < H2O < I- < CN-

Solution

The crystal field-splitting for Cr3+ ion in octahedral field increases with increasing strength of ligands. This order given in (A) is according to spectrochemical series.

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