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Electronic Energy Levels in Hexahalotellurate (IV) Complexes

Couch, D. A. and Wilkins, C. J. and Rossman, George R. and Gray, Harry B. (1970) Electronic Energy Levels in Hexahalotellurate (IV) Complexes. Journal of the American Chemical Society, 92 (2). pp. 307-310. ISSN 0002-7863.

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The electronic spectra of the octahedral Tecl_6^(2-) and TeBr+6^(2-) complexes are reported and assigned. The s → p transition a_(lg)σ^* → t_(lu)σ^* gives rise to three spin-allowed bands in TeCl_6^(2-) (32,880; 34,480; 35,680 cm^(-1)) and TeBr_6^(2-) (28,470; 29,730; 30,850 cm^(-1)). These data are taken as evidence that the excited singlet states are distorted to lower symmetry, probably C_(2v). The lowest allowed halide → Te(IV) charge transfer transitions are at 44,170 cm^(-1) and somewhat higher than 52,000 cm^(-1) in TeCl_6^(2-); analogous transitions appear at 37,000 and 42,600 cm^(-1) in TeBr_6^(2-). The observed spectral data indicate that the "inert" 5s^2 Te(IV) electrons, which reside in the a_(lg)σ^* level, are partially delocalized to the halide ligands.

Item Type:Article
Related URLs:
URLURL TypeDescription
Rossman, George R.0000-0002-4571-6884
Gray, Harry B.0000-0002-7937-7876
Additional Information:© 1970 American Chemical Society. The authors acknowledge financial support from the Selenium-Tellurium Development Association, New York. This study was also supported by the National Science Foundation. One of us (H. B. G.) is grateful to the University of Canterbury, New Zealand, for an Erskine Fellowship which made possible his participation in this research.
Funding AgencyGrant Number
Selenium-Tellurium Development Association, New YorkUNSPECIFIED
University of Canterbury Erskine FellowshipUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20140225-145547464
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Official Citation: Electronic energy levels in hexahalotellurate(IV) complexes D. A. Couch, C. J. Wilkins, George R. Rossman, and Harry B. Gray Journal of the American Chemical Society 1970 92 (2), 307-310
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:43991
Deposited By: Ruth Sustaita
Deposited On:25 Feb 2014 23:28
Last Modified:22 Nov 2019 09:58

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