Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Sharp-Line Electronic Spectroscopy and Ligand Field Analysis of [Cr(trans-diammac)](ClO4)3 1

  • Choi, Jong-Ha (Department of Chemistry, Andong National University) ;
  • Oh, In-Gyung (Department of Chemistry, Andong National University)
  • Published : 1997.01.20
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Abstract

The luminescence and excitation spectra of [Cr(trans-diammac)](ClO4)3 (trans-diammac=trans-6, 3-dimethyl-l, 4, 8, 11-tetraazacyclotetradecane-6, 13-diamine) taken at 77 K are reported. The mid and far-infrared spectra at room-temperature are also measured between 4000 cm-1and 50 cm-1. In the excitation spectrum the 2Eg components are splitted by 102 cm-1. Using the observed electronic transitions, a ligand field analysis was performed to determine more detailed bonding properties of the coordinated atoms toward chromium(Ⅲ). According to the results, we can confirm that the six nitrogen atoms have a strong σ-donor character, and the trans-diammac secondary amine has a greater value of eσ than does the primary amine.

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References

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