o ‐Phenylene‐ and o‐ benzyl‐linked P/N−Si/Sn Lewis pairs
| Autor: | Lucas Wickemeyer, Henric Steffenfauseweh, Beate Neumann, Hans‐Georg Stammler, Norbert W. Mitzel |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Zeitschrift für anorganische und allgemeine Chemie. 649 |
| ISSN: | 1521-3749 0044-2313 |
| DOI: | 10.1002/zaac.202200370 |
| Popis: | A series of different aryl-linked (frustrated) Lewis pairs with perfluoroethylsilyl and -stannyl functions as Lewis acids has been prepared. The 1,2-phenylene linked tin/phosphorus Lewis pair with a di-tert-butylphosphanyl unit as base shows a strong intramolecular donor-acceptor interaction, but still readily adds hydrogen chloride. At the same time, the analogous silicon/phosphorus Lewis pair could not be obtained due to the decomposition of at least one perfluoroethyl group. With a sterically more demanding 2,2,6,6-tetramethylpiperidine base, stable Lewis pairs could be obtained for both, silicon and tin. However, they do not show activity in small molecule activation with H-2, phenyl isocyanate, CS2 or SO2. Furthermore, 2-benzyl-linked tin/nitrogen and silicon/phosphorus Lewis pairs were synthesized. Studies on their reactions towards small molecules did not show any reactivity, probably caused by an unfavorable preorganization due to rotation of the benzyl position. |
| Databáze: | OpenAIRE |
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