March 3, 2026Open Access

Simple Access to a Series of Higher Substituted Pentafluoroorthotellurate‐Based Silanes

Key Points

Increased fluoride ion affinity was notably observed with more pentafluoroorthotellurate groups, implying enhanced Lewis acidity in those compounds.
Characterization of molecular structures showed specific configurations for compounds Ph3SiOTeF5 and tBuSi(OTeF5)3.
The analysis involved reactions between chlorosilanes and OTeF5 transfer reagents to yield silicon compounds with pentafluoroorthotellurate groups.
Higher substitution rates in silanes resulted in significant variations in fluoride ion affinity measurements, indicating potential applications in material science.

Abstract

The preparation and characterization of RxR'ySiOTeF5 (R = Me, Et, iPr, Ph; x = 3, y = 0; R = Pr, tBu, R' = Me; x = 1, y = 2; 1a-1f), R2Si(OTeF5)2 (R = Me, Et, iPr, Ph; 2a-2d) and RSi(OTeF5)3 (R = Me, Et, tBu, Ph; 3a-3d) by reaction of the corresponding chlorosilane and an OTeF5 transfer reagent is presented. Molecular structures in the solid state were obtained for Ph3SiOTeF5 (1f), Ph2Si(OTeF5)2 (2d) and tBuSi(OTeF5)3 (3c). Furthermore, the Lewis acidity was assessed by calculating the fluoride ion affinity (FIA), leading to the observation that a higher number of pentafluoroorthotellurate groups results in an increased FIA.

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Cite This Study

Oesten et al. (Tue,) studied this question.

synapsesocial.com/papers/69a75b42c6e9836116a22447 https://doi.org/https://doi.org/10.1002/chem.202503448

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