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21 April, 17:16

The visible spectrum of the Cr (acac) 3

complex is significantly different from the [Cr (en) 3]Br3 complex. Why?

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  1. 21 April, 19:24
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    The observable visible spectrum of Cr (acac) 3 complex is different from that of

    [Cr (en) 3]Br3 due to strength of bonded ligand in the coordination sphere.

    en is a strong field ligand compared to acac thus pairing occurs. In both the complexes

    Cr is in + 3 state, configuration [Ar] 3d^3. There are 3 unpaired e in Cr (acac) 3 whereas 1 unpaired e in [Cr (en) 3]Br3 due to pairing.
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