Ring-Expansion Metathesis Polymerization Under ConfinementÂ
P. Probst, M. Lindemann, J. R. Bruckner, B. Atwi, D. Wang, F. R. Fischer, M. Högler, M. Bauer, N. Hansen, M. Dyballa and M. R. Buchmeiser J. Am. Chem. Soc. 2025, 147, 8741–8750.
Project B04
Tuning C6/C8 selectivity in oligomerizations
Tuning C6/C8 selectivity of Cr-catalyzed oligomerization of ethylene by exploiting confinement effects
– New project since July 2022 –
In this funding period, we will transfer the concept of confinement-governed olefin-metathesis-based macrocyclization to confinement-governed oligomerization of small molecules. Here, the main aim is to exploit confinement effects to selectively produce trimeric or tetrameric products from ethylene, i.e., 1-hexene or 1-octene, respectively. To this end we will use immobilized Cr catalysts that are robust and promising alternatives to existing Cr-complexes. We aim to exploit constrained geometries to selectively stabilize those transition geometries that lead to desired end products and we will leverage acidity, polarity and π-donating abilities of the support.
Room Temperature Ethene to Propene (ETP) Tandem Catalysis using Single Crystalline Solid-State Molecular Pre-Catalysts
K. M. Altus, Y. Shi, P. Probst, J. H. Heaton, M. R. Gyton, L. Lari, M. R. Buchmeiser, P. W. Dyer and A. S. Weller Angew. Chem. Int. Ed. 2025, 64, e202419923.
Chromium(II)/(III) Complexes Bearing Phosphino-N-Heterocyclic Carbene and N-Chelating N-Heterocyclic Carbene Ligands and Their Use in Ethylene Oligomerization
S. Bhattacharya, B. Atwi, K. Kundu, W. Frey and M. R. Buchmeiser Organometallics 2025, 44, 315−324.
Hydrogen spillover through hydride transfer: the reaction of ZnO and ZrO2Â with strong hydride donors
M. Benz, O. Bunjaku, M. Nowakowski, A. Allgaier, I. Biswas, J. van Slageren, M. Bauer and D. P. Estes Catal. Sci. Technol., 2024, 14, 5854-5863.
Stereoselective Ring Expansion Metathesis Polymerization with Cationic Molybdenum Alkylidyne N-Heterocyclic Carbene Complexes
P. Probst, J. Groos, D. Wang, A. Beck, K. Gugeler, J. Kästner, W. Frey and M. R. Buchmeiser J. Am. Chem. Soc. 2024, 146, 12, 8435–8446.
Macrocyclization of Dienes Under Confinement With Cationic Tungsten Imido/Oxo Alkylidene N-Heterocyclic Carbene Complexes
F. Ziegler, J. R. Bruckner, M. Nowakowski, M. Bauer, P. Probst, B. Atwi, M. R. Buchmeiser ChemCatChem, 2023,15 (21), e202300871.
Cationic Molybdenum Imido Alkylidene N-Heterocyclic Carbene Complexes Confined in Mesoporous Silica: Tuning Transition States Towards Z-Selective Ring-Opening Cross-Metathesis
E. L. Goldstein, F. Ziegler, A.-K. Beurer, Y. Traa, J. R. Bruckner, M. R. Buchmeiser ChemCatChem 2022,14, e202201008.