A5055708203- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Crystallography and molecular interactions
- Organometallic Complex Synthesis and Catalysis
- Catalytic C–H Functionalization Methods
- Synthesis and characterization of novel inorganic/organometallic compounds
- Cyclopropane Reaction Mechanisms
- Organoboron and organosilicon chemistry
- Catalytic Alkyne Reactions
- Catalytic Cross-Coupling Reactions
- Asymmetric Hydrogenation and Catalysis
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Synthesis and Reactivity of Heterocycles
- Supramolecular Chemistry and Complexes
- Fullerene Chemistry and Applications
- Molecular Junctions and Nanostructures
- Synthesis and Properties of Aromatic Compounds
- Magnetism in coordination complexes
- Asymmetric Synthesis and Catalysis
Ruhr University Bochum
2019-2025
Universitat Jaume I
2019
University of Münster
2018
A palladium-cornered molecular square with four pyrene-bis(imidazolylidene) bridging ligands is reported. This metallo-polygon can encapsulate C60 and C70 . The X-ray diffraction structures of the empty cage as well cages complexed both fullerenes are described. fullerene encapsulation produces perturbations in structural parameters metallo-square, showing that it adjust shape its cavity to size each fullerene.
Secondary ligand-metal interactions are decisive in many catalytic transformations. While arene-gold have repeatedly been reported as critical structural feature high-performance gold catalysts, we herein report that these can also be replaced by Au⋅⋅⋅H-C hydrogen bonds without suffering any reduction performance. Systematic experimental and computational studies on a series of ylide-substituted phosphines featuring either PPh3 (Ph YPhos) or PCy3 (Cy moiety showed the interaction...
Abstract α‐Metallated ylides have recently been reported to undergo phosphine by CO exchange at the ylidic carbon atom form isolable ketenyl anions. Systematic studies on tosyl‐substituted yldiides, R 3 P=C(M)Ts (M=Li, Na, K), now reveal that carbonylation may lead a competing metal salt (MTs) elimination. This side‐reaction can be controlled choice of phosphine, cation, solvent and co‐ligands, thus enabling selective isolation anion [Ts−CCO]M ( 2‐M ). Complexation 2‐Na crown ether or...
Abstract The ylide‐functionalized diisopropyl phosphine (prYPhos) promotes Pd‐catalyzed Suzuki‐Miyaura couplings of aryl chlorides and bromides with arylboronic acids. Using Pd 2 (dba) 3 /prYPhos as the catalyst K CO base, various (hetero)biaryls were synthesized in 45–98% yields at mild reaction conditions, tolerating sensitive functional groups steric hindrance. electron rich, sterically demanding ligand induces a high selectivity for halides versus triflate. Chloroaryl triflates...
Increasing the donor strength of Lewis bases is a viable strategy to stabilize reactive species. Herein, we utilize strong electron-releasing power ylide substituents gain access electron-rich...
The synthesis and properties of a series strongly electron-donating, sterically demanding dialkyl(1,3-diarylimidazolin-2-ylidenamino)phosphines (IAPs) are reported. Determination the TEP values shows that bulky IAPs better donor ligands than classical N-heterocyclic carbenes. steric profiles in neutral cationic gold(I) complexes were analyzed by X-ray diffraction studies computational methods, revealing similar structural features to Buchwald-type phosphines. new phosphines tested...
Abstract A palladium‐cornered molecular square with four pyrene‐bis(imidazolylidene) bridging ligands is reported. This metallo‐polygon can encapsulate C 60 and 70 . The X‐ray diffraction structures of the empty cage as well cages complexed both fullerenes are described. fullerene encapsulation produces perturbations in structural parameters metallo‐square, showing that it adjust shape its cavity to size each fullerene.
Dinuclear low-valent compounds of the heavy main group elements are rare species owing to their intrinsic reactivity. However, they represent desirable target molecules due unusual bonding situations as well applications in bond activations and materials synthesis. The isolation such usually requires use substituents that provide sufficient stability synthetic access. Herein, we report on strongly donating ylide-substituents access dinuclear 14 compounds. ylides not only impart steric...
Abstract Secondary ligand–metal interactions are decisive in many catalytic transformations. While arene–gold have repeatedly been reported as critical structural feature high‐performance gold catalysts, we herein report that these can also be replaced by Au⋅⋅⋅H−C hydrogen bonds without suffering any reduction performance. Systematic experimental and computational studies on a series of ylide‐substituted phosphines featuring either PPh 3 ( Ph YPhos) or PCy Cy moiety showed the arene‐gold...
The preparation and isolation of the metalated ylides [Cy3PCSO2Tol]M ( Cy1-M) (with M = Li, Na, K) are reported. In contrast to its triphenylphosphonium analogue synthesis Cy1-M revealed be less straight forward. Synthetic routes phosphonium salt precursor Cy1-H2 via different methods unsuccessful or low-yielding. However, nucleophilic attack ylide Cy3P CH2 at toluenesulfonyl fluoride under basic conditions proved a high-yielding method directly leading Cy1-H. Metalation yldiides was finally...
α-Metallated ylides have recently been reported to undergo phosphine by CO exchange at the ylidic carbon atom form isolable ketenyl anions. Systematic studies on tosyl-substituted metallated (R3P=C(M)Ts) now reveal that carbonylation leads either or metal salt (MTs) elimination. The selectivity of this reaction can be controlled nature and cation, solvent additional co-ligands, enabling full control isolation anion [Ts-CCO]M (2-M, M = Na, K) in high yields. Complexation 2-Na crown ether...
Abstract Kürzlich berichteten wir, dass α‐metallierte Ylide einen Phosphan‐CO‐Ligandenaustausch eingehen und darüber Zugang zu isolierbaren Ketenylanion liefern. Systematische Studien an Tosyl‐substituierten Yldiiden der Form R 3 P=C(M)Ts (M=Li, Na, K) zeigen nun, die Carbonylierung auch einer konkurrierenden Metallsalzeliminierung (MTs) führen kann. Diese Nebenreaktion kann durch Wahl des Phosphans, Metallkations, Lösungsmittels Zugabe geeigneter Coliganden kontrolliert werden, was...