Turn on thread page Beta
    • Thread Starter
    Offline

    21
    ReputationRep:
    Consider the UV-visible spectra of the complexes in part (a). One of the complexes shows a band for a metal to ligand charge transfer (MLCT).

    (i) Explain why this MLCT would be allowed by the Laporte, parity and spin selection
    rules. [3 marks]

    (ii) With reasoning, state which one of the complexes below is likely to show a band for an MLCT.[Mn(OH2)6]3+[Fe(CO)4]2– [Ni(en)3]2+



    I'm not too sure how you know which complex has which charge transfer.
    for instance, how do you know if an electron is transferred from an orbital on a ligand to a metal orbital, etc.

    Charge transfer bands is a topic I'm struggling with.
    Any help would much be appreciated, thank you!
    • Thread Starter
    Offline

    21
    ReputationRep:
    Bump


    Posted from TSR Mobile
    • Thread Starter
    Offline

    21
    ReputationRep:
    Bump


    Posted from TSR Mobile
    • Community Assistant
    • Study Helper
    Online

    17
    ReputationRep:
    Community Assistant
    Study Helper
    (Original post by Bloom77)
    Consider the UV-visible spectra of the complexes in part (a). One of the complexes shows a band for a metal to ligand charge transfer (MLCT).

    (i) Explain why this MLCT would be allowed by the Laporte, parity and spin selection
    rules. [3 marks]

    (ii) With reasoning, state which one of the complexes below is likely to show a band for an MLCT.[Mn(OH2)6]3+[Fe(CO)4]2– [Ni(en)3]2+



    I'm not too sure how you know which complex has which charge transfer.
    for instance, how do you know if an electron is transferred from an orbital on a ligand to a metal orbital, etc.

    Charge transfer bands is a topic I'm struggling with.
    Any help would much be appreciated, thank you!
    The ligand needs an empty orbital with the correct orientation and energy level to accept a pair of electrons from the transition metal 3d orbitals.

    I do not know the Laporte, parity and spin selection rules off by heart, but I imagine that you could look them up and consider the MO theory of the ligands.

    It looks to me like [Fe(CO)4]2- from what I remember of CO ligand complexes (it's been a long time!)
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: January 8, 2017

University open days

  • Southampton Solent University
    All faculties Undergraduate
    Sun, 18 Nov '18
  • University of Bradford
    All faculties Undergraduate
    Wed, 21 Nov '18
  • Buckinghamshire New University
    All Faculties Postgraduate
    Wed, 21 Nov '18
Poll
Black Friday: Yay or Nay?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.