Lehnfeld, Felix and Oswald, Tim and Beckhaus, Ruediger and Scheer, Manfred (2023) Mono-Alkyl-Substituted Phosphinoboranes (HRP-BH<sub>2</sub>-NMe<sub>3</sub>) as Precursors for Poly(alkylphosphinoborane)s: Improved Synthesis and Comparative Study. INORGANICS, 11 (10): 377. ISSN , 2304-6740
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A new synthetic pathway to various mono-alkyl-substituted phosphinoboranes HRP-BH2-NMe3 has been developed. The new synthetic route starting from alkyl halides and NaPH2 followed by metalation and salt metathesis is performed in a one-pot procedure and leads to higher yields and purity of the resulting phosphinoboranes, as compared to previously reported routes. Additionally, the scope of accessible compounds could be expanded from short-chained linear alkyl substituents to longer-chained linear alkyl substituents as well as secondary or functionalized alkyl substituents. The reported examples include primary alkyl-substituted phosphinoboranes RHP-BH2-NMe3 (R = n-butyl, n-pentyl, n-hexyl; 1a-c), the secondary alkyl-substituted derivatives iPrPH-BH2-NMe3 (2), and the functionalized alkyl-substituted 4-bromo-butyl-phosphinoborane (BrC4H8)PH-BH2-NMe3 (3). Compounds 1a, 1c, and 2 were additionally used for preliminary polymerization reactions via a thermal and a transition metal-catalyzed pathway, revealing the formation of high-molecular-weight polymers under certain conditions. Detailed investigations on the influence of temperature, concentration, substituents and reaction time on the respective polymerization reactions were performed.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PHOSPHORUS-BORON BONDS; AMINE-BORANES; CATALYZED DEHYDROPOLYMERIZATION; INORGANIC POLYMERS; ROUTE; POLYMERIZATION; POLYPHOSPHAZENES; POLYAMINOBORANES; CONVERSION; NITROGEN; 13/15 compounds; boron; phosphorus; polymerization |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Manfred Scheer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 10 Mar 2024 10:57 |
| Last Modified: | 10 Mar 2024 10:57 |
| URI: | https://pred.uni-regensburg.de/id/eprint/59549 |
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