Dr. Kai Schwedtmann
© AK Weigand
Scientific Assistant
NameDr. Kai Schwedtmann
Supervision of molecular chemistry/Management of the NMR facility
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Research Topic
Reactive phosphorus compounds and sustainable phosphorus chemistry / heteronuclear NMR spectroscopy
Publications
Paper
2025 42. Synthesis and Reactivity of Triphosphaallyl Cation Stabilized by N-Heterocyclic Carbenes; J. Frötschel-Rittmeyer, F. Hennersdorf, J. Fidelius, C. Sala, C. Ziegler, M. Holthausen, K. Schwedtmann, R. Wolf, J. J. Weigand; Chem. Eur. J., 2025, accepted.
41. 1,3-Dipolar Cycloaddition Reactions of Triflatophosphanes to Functionalized Azaphospholium Salts and Azaphospholes; J. Fidelius, K. Schwedtmann, S. Schellhammer, R. Huang, F. Hennersdorf, M. Fink, J. Haberstroh, A. Bauzá, A. Frontera, S. Reineke, J. J. Weigand; Inorg. Chem. Front., 2025, 12, 3324.
40. Phosphorus Ring Expansion at Cobalt: Targeted Synthesis of P4, P5 and P7 Ligands; K. Trabitsch, S. Hauer, K. Schwedtmann, P. Royla, J. J. Weigand, R. Wolf; Inorg. Chem. Front., 2025, 12, 2013.
39. Zwitterionic 2-Phosphaethene-thiolates [(LC)P=CS(LC/P)]+ as PCS Building Blocks (LC = NHC, LP = PR3); P. Royla, K. Schwedtmann, R. S. Gomila, A. Frontera, J. J. Weigand; Angew. Chem. Int. Ed., 2025, 64, e202419502.
2024 38. A neutral diphosphene radical: synthesis, electronic structure and white phosphorus activation; J. Haberstroh, C. Taube, J. Fidelius, S. Schulz, N. Israel, E. Dmitrieva, R. M. Gomila, A. Frontera, R. Wolf, K. Schwedtmann, J. J. Weigand; Chem. Commun., 2024, DOI: 10.1039/D4CC02200A.
37. Convenient access to π-conjugated 1,3-azaphospholes from alkynes via [3+2]-cycloaddition and reductive aromatization; J. Fidelius, K. Schwedtmann, J. J. Weigand, Synform, 2024, A111.
36. Redox-Neutral Conversion of Ubiquitous PV Sources to a Versatile PO2+ Phosphorylation Reagent; T. Schneider, K. Schwedtmann, J. J. Weigand; Synform, 2024, 3, A38.
35. Cobalt-Mediated [3+1] Fragmentation of White Phosphorus:Access to Acylcyanophosphanides; S. Hauer, T. M. Horsley Downie, G. Balázs, K. Schwedtmann, J. J. Weigand, R. Wolf; Angew. Chem Int. Ed., 2024, DOI: 10.1002/anie.202317170.
34. Convenient access to π-conjugated 1,3-azaphospholes from alkynes via [3+2]-cycloaddition and reductive aromatization; J. Fidelius, K. Schwedtmann, S. Schellhammer, J. Haberstroh, S. Schulz, R. Huang, M. C. Klotzsche, A. Bauzá, A. Frontera, S. Reineke, J. J. Weigand; CHEM, 2024, 10, 644.
2023 33. Visible-Light-Triggered Photoswitching of Diphosphene Complexes; C. Taube, J. Fidelius, K. Schwedtmann, C. Ziegler, F. Kreuter, L. Loots, L. J. Barbour, R. Tonner-Zech, R. Wolf, J. J. Weigand; Angew. Chem. Int. Ed., 2023, DOI: 10.1002/anie.202306706.
32. Formation of a Hexaphosphido Cobalt Complex through P–P Condensation; C. Hoidn, K. Trabitsch, K. Schwedtmann, C. Taube, J. J. Weigand, R. Wolf; Chem. Eur J., 2023, DOI: 10.1002/chem.202301930.
31. The role of polysulfide-saturation in electrolytes for high power applications of real world Li-S pouch cells; T. Boenke, S. Kirchhoff, F. S. Reuter, F. Schmidt, C. Weller, S. Dörfler, K. Schwedtmann, P. Härtel, T. Abendroth, H. Althues, J. J. Weigand, S. Kaskel; Nano Res., 2023, 16, 8313.
30. Structure-Activity Relationships of Triphenylethylene Derivatives and Their Evaluation as Anticancer and Antiviral Agents; N. S. Ahmed, H. E. El-Nakib, M. M. Ramsis, N. O. Albably, J. Wober, J. J. Weigand, K. Schwedtmann, O. Zierau, A. H. Abadi; ACS Omega, 2023, DOI: 10.1021/acsomega.3c01682.
29. Redox-neutral conversion of ubiquitous PV sources to a versatile PO2+ phosphorylation reagent; T. Schneider, K. Schwedtmann, J. Fidelius, J. J. Weigand; Nat. Synt., 2023, DOI: 10.1038/s44160-023-00344-0. 28. Cationic Phosphinidene as a Versatile P1 Building Block: [LC-P]+ Transfer from Phosphonio-Phosphanides [LC–P–PR3]+ and Subsequent LC Replacement Reactions (LC = N-Heterocyclic Carbene); P. Royla, K. Schwedtmann, Z. Han, J. Fidelius, D. P. Gates, R. M. Gomila, A. Frontera, J. J. Weigand; J. Am. Chem. Soc., 2023, DOI: 10.1021/jacs.3c02256.
2022 27. Direct conversion of white phosphorus to versatile phosphorus transfer reagents via oxidative onioation; M. Donath, K. Schwedtmann, T. Schneider, F. Hennersdorf, A. Bauzá, A. Frontera, J. J. Weigand; Nat. Chem., 2022, 14, 384.
2021 26. Manipulating Estrogenic/Anti-Estrogenic Activity of Triphenylethylenes towards Development of Novel Anti-Neoplastic SERMs; H. E. Elnakib, M. M. Ramsis, N. O. Albably, M. A. Vector, J. J. Weigand, K. Schwedtmann, J. Wober, O. Zierau, G. Vollmer, A. H. Abadi, N. S. Ahmed; Int. J. Mol. Sci. 2021, 22, 12575.
25. Bifunctional fluorophosphonium triflates as intramolecular Frustrated Lewis Pairs: reversible CO2 sequestration and binding of carbonyls, nitriles and acetylenes; C.-X. Guo, K. Schwedtmann, J. Fidelius, F. Hennersdorf, A. Dickschat, A. Bauzá, A. Frontera, J. J. Weigand; Chem. Eur. J., 2021, 27, 13709.
24. A Convenient Access to Fluorophosphonium Triflate Salts by Electrophilic Fluorination and Anion Exchange; C.-X. Guo, S. Yogendra, R. M. Gomila, A. Frontera, F. Hennersdorf, J. Steup, K. Schwedtmann, J. J. Weigand; Inorg. Chem. Front., 2021, 8, 2854.
23. Design and Synthesis of Novel Symmetric Fluorene-2,7-diamine Derivatives as Potent Hepatitis C Virus Inhibitors; M. Mousa, N. Ahmed, K. Schwedtmann, E. Frakolaki, N. Vassilaki, G. Zoidis, J. J. Weigand, A. H. Abadi, Pharmaceuticals, 2021, 14, 292.
22. Coordination of Trivalent Lanthanum and Cerium, and Tetravalent Cerium and Actinides (An = Th(IV), U(IV), Np(IV)) by a 4-Phosphoryl 1H-Pyrazol-5-olate Ligand in Solution and the Solid State; J. Zhang, M. Wenzel, K. Schnaars, F. Hennersdorf, K. Schwedtmann, J. März, A. Rossberg, P. Kaden, F. Kraus, T. Stumpf, J. J. Weigand; Dalton Trans., 2021, 50, 3550.
21. Pyrazolyl-substituted Phosphorus(III) Compounds in Synthesis; R. Schoemaker, K. Schwedtmann, J. J. Weigand; Coord. Chem. Rev., 2021, 436, 213829.
20. Flowers of the plant genus Hypericum as versatile photoredox catalyst; J. Wang, K. Schwedtmann, K. Liu, S. Schulz, J. Haberstroh, G. Schaper, A. Wenke, J. Naumann, T. Wenke, S. Wanke, J. J. Weigand; Green Chem., 2021, 23, 881. 2020 19. Coordination Chemistry and Methylation of Mixed-substituted Tetraphosphetanes (RP-PtBu)2 (R = Ph, Py); R. Schoemaker, P. Kossatz, K. Schwedtmann, F. Hennersdorf, J. J. Weigand; Chem. Eur. J., 2020, 26, 11734. (Cover Profile: DOI: 10.1002/chem.202003227; Front Cover: DOI: 10.1002/chem.202003226)
18. Towards N,P-Doped π-Extended PAHs - A One-Pot Synthesis to Diannulated 1,4,2-Diazaphospholium Triflate Salts; R. Schoemaker, K. Schwedtmann, F. Hennersdorf, A. Bauzá, A. Frontera, J. J. Weigand; J. Org. Chem., 2020, 85, 14420. 17. Facile synthesis of tellurium nano-and microstructures by HCl traces in ionic liquid; T. Zhang, T. Doert, K. Schwedtmann, J. J. Weigand, M. Ruck; Dalton Trans., 2020, 49, 1891.
16. P–P Condensation and P/N–P/P bond metathesis: Facile Synthesis of Cationic Tri- and Tetraphosphanes; C. Taube, K. Schwedtmann, M. Noikham, E. Somsook, F. Hennersdorf, R. Wolf, J. J. Weigand; Angew. Chem. Int. Ed., 2020, 59, 3585. (Inside Cover: DOI: 10.1002/anie.201916375 )
2019 15. Controlled Scrambling Reactions to Polyphosphanes via Bond Metathesis Reactions; R. Schoemaker, K. Schwedtmann, A. Franconetti, A. Frontera, F. Hennersdorf, J. J. Weigand, Chem. Sci., 2019, 10, 11054.
14. Functionalization of Pentaphosphorus Cations by Complexation; A.-K. Adhikari, C. Ziegler, K. Schwedtmann, C. Taube, J. J. Weigand, R. Wolf; Angew. Chem. Int. Ed., 2019, 58, 18584.
13. Amido Silicon Chalcogenide Compounds with Unprecedented Cluster Cores and Low Oxidation State Silicon Atoms; K. Schwedtmann, A. Hepp, K. Schwedtmann, J. J. Weigand, F. Lips; Eur. J. Inorg. Chem., 2019, 4719. 12. Formation of an imidazoliumyl-substituted [(LC)4P4]4+ tetracation and transition metal mediated fragmentation and insertion reaction (LC = NHC); K. Schwedtmann, J. Haberstroh, S. Roediger, F. Hennersdorf, A. Bauza, A. Frontera, J. J. Weigand; Chem. Sci., 2019, 10, 6868.
11. 1,3-Diphosphacyclobutene Cobalt Complexes; C. Rödl, K. Schwedtmann, J. J. Weigand, R. Wolf; Chem. Eur. J., 2019, 25, 6180.
2018 10. Understanding the chemical reactivity of phosphonium-based ionic liquids with tellurium; T. Zhang, K. Schwedtmann, J. J. Weigand, T. Doert, M. Ruck; Chem. Eur. J., 2018, 24, 9325.
9. Recent Advances in Imidazoliumyl-substituted Phosphorus Compounds; K. Schwedtmann, G. Zanoni, J. J. Weigand; Chem. Asian J., 2018, 13, 1388 .
2017 8. Dissolution behaviour and activation of selenium in phosphonium based ionic liquids; T. Zhang, K. Schwedtmann, J. J. Weigand, T. Doert, M. Ruck, Chem. Commun., 2017, 53, 7588.
7. Isolation of Azadiphosphiridines and Diphosphenimines by Cycloaddition of Azides and a Cationic Diphosphene; K. Schwedtmann, F. Hennersdorf, A. Bauzà, A. Frontera, R. Fischer, J. J. Weigand, Angew. Chem. Int. Ed., 2017, 56, 6218.
2016 6. The Importance of Pore Size and Surface Polarity for Polysulfide Adsorption in Lithium Sulfur Batteries ; F. Hippauf, W. Nickel, G-P. Hao, K. Schwedtmann, L. Giebeler, S. Oswald, L. Borchardt, S. Doerfler, J. J. Weigand, S. Kaskel; Adv. Mater. Interfaces, 2016, 3, 1600508.
5. Cationic 5-phosphonio-substituted N-heterocyclic carbenes; K. Schwedtmann, R. Schoemaker, F. Hennersdorf, Antonio Bauza, Antonio Frontera, Robert Weiss, Jan J. Weigand; Dalton Trans., 2016, 45, 11384.
4. [(ClImDipp)P=P(Dipp)][GaCl4]: a polarized, cationic diphosphene; K. Schwedtmann, M. H. Holthausen, C. H. Sala, F. Hennersdorf, R. Fröhlich, J. J. Weigand; Chem. Commun., 2016, 52, 1409.
3. Tetra-cationic imidazoliumyl-substituted phosphorus-sulfur heterocycles from a cationic organophosphorus sulfide; F. D. Henne, F. A. Watt, K. Schwedtmann, F. Hennersdorf, M. Kokoschka, J. J. Weigand; Chem. Commun., 2016, 52, 10, 2023.
2015 2. Synthesis and EPR/UV/Vis-NIR Spectroelectrochemical Investigation of a Persistent Phosphanyl Radical Dication; K. Schwedtmann, S. Schulz, F. Hennersdorf, T. Strassner, E. Dmitrieva, J. J. Weigand; Angew. Chem. Int. Ed., 2015, 54, 11054.
2013 1. NHC-Mediated Synthesis of an Asymmetric, Cationic Phosphoranide, a Phosphanide, and Coinage-Metal Phosphanido Complexes; K. Schwedtmann, M. H. Holthausen, K.-O. Feldmann, J. J. Weigand; Angew. Chem. Int. Ed., 2013, 52, 14204.