Some investigations of the chemistry of tellurium chloride pentafluoride, its reaction with caesium fluoride, and the preparation of cis and trans methoxytellurium(VI) chloride tetrafluoride, (CH₃O)TeClF₄

Abstract

The reaction of TeClF5 with CH3OH, and CH3OSiMe3, leads to a mixture of cis- and trans-(CH3O)TeClF4 in a ratio of 1:6, as well as some unidentified Te(IV) product. The vibrational spectrum of the 1:6 mixture of cis- and trans-(CH3O)TeClF4 was accounted for on the basis of the predominant pseudo-C4vtrans isomer. TeClF5 is unreactive towards anhydrous HF, SbF5, AlCl3, SO2, F2, and ClF at room temperature. Over the temperature range 70–250 °C it thermally decomposes to TeF6, TeF4, and Cl2. It slowly reacts with CsF to form CsTeF5, TeF6, Cl2, and small amounts of ClF, and with HNMe2 it is also reduced to form TeF4•HNMe2.

125Te and 19F NMR spectroscopic study of the hydrolysis of pentafluorotellurium chloride: evidence for trans- and cis-HOTeF4Cl and cis, mer-(HO)2TeF3Cl

“…The ratio of Te(1V) to Te(V1) species varied somewhat from reaction to reaction, although the ratio was approximately 1:l in most cases. The formation of Te(1V) species has been reported previously in the reactions of TeF5Cl with other nucleophiles (21,23). The reaction of TeF5Cl with C s F yields C1F and CsTeF5 but not Te(V1) species (21).…”

“…The formation of Te(1V) species has been reported previously in the reactions of TeF5Cl with other nucleophiles (21,23). The reaction of TeF5Cl with C s F yields C1F and CsTeF5 but not Te(V1) species (21). The suggested pathway for this reaction is attack by Fon the partially positively charged chlorine ligand of TeF5Cl (eq.…”