Understand the two doubly degenerate mode of D4h symmetry

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SUMMARY

The discussion centers on the two doubly degenerate modes of D4h symmetry, specifically in relation to the PtCl4 molecule, which has a square planar structure. The charge of the PtCl4 ion is confirmed to be -2, indicating it is a [PtCl4]2- ion. The multiplicity of platinum in this context is determined to be 1, as it has a closed-shell singlet ground state. The conversation also highlights the need for further understanding of the vibrational characteristics of the two degenerate Eu modes.

PREREQUISITES
  • Understanding of D4h symmetry in molecular structures
  • Knowledge of coordination chemistry, specifically regarding platinum complexes
  • Familiarity with vibrational modes and their significance in molecular spectroscopy
  • Basic principles of quantum mechanics, particularly spin multiplicity
NEXT STEPS
  • Research the vibrational analysis of D4h symmetric molecules
  • Study the electronic structure of platinum complexes, focusing on PtCl4
  • Learn about the implications of spin multiplicity in coordination compounds
  • Explore computational methods for modeling vibrational modes in molecular systems
USEFUL FOR

Chemists, particularly those specializing in coordination chemistry, molecular symmetry, and vibrational spectroscopy, will benefit from this discussion.

Rajini
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Hello all,
This is not a homework problem. Just to understand the two doubly degenerate mode of D4h symmetry i wanted to make sample calculation. Pt in the middle of a square formed by 4 Cl atoms. PtCl4 has square planar structure (AB4) molecule.
1. What is the whole charge of PtCl4 ? Is this -2 ?
2. Multiplicity of Pt ? Multiplicity = [2S+1] where S is spin state of Pt.
thanks.
 
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That would naturally depend on which oxidation state of platinum you're interested in. But since the [PtCl4]2- ion is well-known, I'm assuming that's the one you want. It has a closed-shell singlet ground-state.
 


Hello,
So multiplicity is 1? please give the number!
Because nobody knows about the vibrational picture of the partners of the two degenerate Eu modes. I need to find how it vibrates.
 

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