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Imdadul Haque posted an Question
September 14, 2020 • 15:07 pm 30 points
  • IIT JAM
  • Chemistry (CY)

The ion(s) that exhibit only charge transfer bands in the absorption spectra (uv-visible region) is/are: (a) [cr(c20)p b[cro (c)[reo4] (d) [nio.*

The ion(s) that exhibit only charge transfer bands in the absorption spectra (UV-visible region) is/are: (a) [Cr(C20)P b[CrO (C)[ReO4] (d) [Nio.*

2 Answer(s) Answer Now
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  • Suman Kumar best-answer

    Option B & C is correct

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    Here Charge transfer is responsible for the colour

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    ReO⁴- in this Re is in +7 Oxidation State so it is d⁰ configuration

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    CrO⁴- Here also Cr is in +6 oxidation state so it is also d⁰ configuration

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    Charge transfer is actually occur from ligand to metal charge transfer

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    please ask if you don't get

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    Did you get this Imdadul

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    Yes Sir,,, Thank You 😊

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    You are welcome Imdadul

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    please accept my answer 🙏😊

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    Priyanshu kumar Best Answer

    B and C both

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    in cro4 2- chromium is in +6 oxidation state

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    and in Re04- ..Re in +7 oxidation state

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    so there is vacant orbital in both these molecules....so there is ligand to metal charge transfer

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    In option 1st see the configuration of chromium

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    It is in Cr3+ configuration....

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    and in option d the configuration of Nickel is +6

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    So no d° configuration in both a option and d option

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    So LMCT occurs in case of both B and C

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    Hope you got this....and please ask if any doubt

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    Yes,,,sir understood . Thank You

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