Marquardt, Christian and Hegen, Oliver and Vogel, Ariane and Stauber, Andreas and Bodensteiner, Michael and Timoshkin, Alexey Y. and Scheer, Manfred (2018) Depolymerization of Poly(phosphinoboranes): From Polymers to Lewis Base Stabilized Monomers. CHEMISTRY-A EUROPEAN JOURNAL, 24 (2). pp. 360-363. ISSN 0947-6539, 1521-3765
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We report on depolymerization reactions of poly(phosphinoboranes). The cleavage of the polymers [H2PBH2](n) (2a), [tBuHPBH(2)](n) (2c), [PhHPBH2](n) (2e) and the oligomer [Ph2PBH2](n) (2b), with strong Lewis bases (LBs), in particular with NHCs, leads to the corresponding monomeric phosphanylboranes (RRPBH2LB)-R-1-P-2. It is observed that the depolymerization depends on the strength and stability of the LBs as well as on the substitution pattern of the poly(phosphinoboranes). The solid state structures of the monomeric phosphinoboranes H2PBH2NHCMe (NHC=N-heterocyclic carbene) (4a), H2PBH2NHCdipp (5a) and tBuHPBH(2)NHC(Me) (4c) were determined. DFT calculations support the experimentally observed reaction behavior.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PHOSPHINE-BORANE ADDUCTS; N-HETEROCYCLIC CARBENES; PHOSPHORUS-BORON BONDS; MAIN-GROUP CHEMISTRY; CATALYZED DEHYDROPOLYMERIZATION; INORGANIC POLYMERS; AMINE-BORANES; ROUTE; POLYMERIZATION; NITROGEN; boranes; carbenes; cleavage reactions; Lewis bases; phosphorus |
| 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: | 23 Mar 2020 10:49 |
| Last Modified: | 23 Mar 2020 10:49 |
| URI: | https://pred.uni-regensburg.de/id/eprint/15207 |
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