A spectroscopic examination of phenyltellurium trihalides
- 1 January 1972
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 4,p. 551-554
- https://doi.org/10.1039/dt9720000551
Abstract
The far-i.r. spectra, and where possible the Raman spectra, of RTeX3 are presented and assigments of tellurium–halogen modes are made (R = Ph, p-Me·C6H4, p-MeO·C6H4, p-EtO·C6H4, p-PhO·C6H4; X = Cl, Br, or I). Consideration of the low-frequency vibrational data and other physical evidence suggests the compounds are associated to some degree with dimeric structures involving five-co-ordinate tellurium atoms the most probable for chlorides and iodides. There is evidence to suggest that some bromides notably PhTeBr3, (p-Me·C6H4)TeBr3, and (p-PhO·C6H4) TeBr3 are more associated. It is suggested that the variety of structural possibilities are best understood in terms of donor–acceptor interactions between X– and RTeX2 +.Keywords
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