Calix(4)pyrrolato aluminate catalyzes the dehydrocoupling of phenylphosphine borane to high molar weight polymers
High molar weight polyphosphinoboranes represent materials with auspicious properties, but their preparation requires transition metal-based catalysts. Here, calix[4]pyrrolato aluminate is shown to induce the dehydropolymerization of phosphine boranes to high molar mass polyphosphinoboranes (up to M...
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| Hauptverfasser: | , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
March 23, 2022
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| In: |
Angewandte Chemie. International edition
Year: 2022, Jahrgang: 61, Heft: 22, Pages: 1-5 |
| ISSN: | 1521-3773 |
| DOI: | 10.1002/anie.202202176 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1002/anie.202202176 Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.202202176 
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| Verfasserangaben: | Florian Schön, Lukas M. Sigmund, Friederike Schneider, Deborah Hartmann, Matthew A. Wiebe, Ian Manners, and Lutz Greb |
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| 520 | |a High molar weight polyphosphinoboranes represent materials with auspicious properties, but their preparation requires transition metal-based catalysts. Here, calix[4]pyrrolato aluminate is shown to induce the dehydropolymerization of phosphine boranes to high molar mass polyphosphinoboranes (up to Mn=43 000 Da). Combined GPC and 31P DOSY NMR spectroscopic analyses, quantum chemical computations, and stoichiometric reactions disclose a P−H bond activation by the cooperative action of the square-planar aluminate and the electron-rich ligand framework. This first transition metal-free catalyst for P−B dehydrocoupling overcomes the problem of residual d-block metal impurities in the resulting polymers that might interfere with the reproducibility of the properties for this emerging class of inorganic materials. | ||
| 650 | 4 | |a Aluminum | |
| 650 | 4 | |a Dehydropolymerization | |
| 650 | 4 | |a Metal-Ligand Cooperativity | |
| 650 | 4 | |a Polymers | |
| 650 | 4 | |a Polyphosphinoboranes | |
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