Alkoxohalogenotellurate(IV): Darstellung und Struktur von Tetraphenylphosphonium-trichloro(dioxo-ethylen-O.O')tellurat(rV) / Alkoxohalogenotellurates(IV): Preparation and Structure of Tetraphenylphosphonium Trichloro(dioxo-ethylene-O,O')tellurate(IV)
Open Access
- 1 March 1981
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 36 (3) , 307-312
- https://doi.org/10.1515/znb-1981-0306
Abstract
The deprotonated glycolate dianion (OCH2CH2O)2- is shown to react as a bidentate chelating ligand towards chalcogen(IV) halides. With TeCl4, the anion TeCl3(O2C2H4)- is formed. According to a single crystal X-ray analysis of the tetraphenylphosphonium salt (P21/c, a = 7.501, b = 26.328, c = 13.582 A, β= 104.55°, Z = 4) Te is in a tetragonal pyramidal (ψ octahedral) coordination with the alcoholate ligands in the apical (Te-O 1.919 Å) and in one of the equatorial positions (Te O 1.973 Å), the Te-Cl bond lengths being between 2.495 and 2.590 Å. The trans bond lengthening effect of the equatorial alcoholate ligand (i.e. the polarizing effect towards the lone pair) is unusually low. Vibrational spectra are reported.Keywords
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