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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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Main Authors: Schön, Florian (Author) , Sigmund, Lukas M. (Author) , Schneider, Friederike (Author) , Hartmann, Deborah (Author) , Wiebe, Matthew A. (Author) , Manners, Ian (Author) , Greb, Lutz (Author)
Format: Article (Journal)
Language:English
Published: March 23, 2022
In: Angewandte Chemie. International edition
Year: 2022, Volume: 61, Issue: 22, Pages: 1-5
ISSN:1521-3773
DOI:10.1002/anie.202202176
Online Access: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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Author Notes:Florian Schön, Lukas M. Sigmund, Friederike Schneider, Deborah Hartmann, Matthew A. Wiebe, Ian Manners, and Lutz Greb
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Summary: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.
Item Description:Im Titel steht 4 in eckiger Klammer
Version of record online: March 29, 2022
Gesehen am 04.10.2022
Physical Description:Online Resource
ISSN:1521-3773
DOI:10.1002/anie.202202176

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