A5042620343- Corporate Governance and Management
- European Monetary and Fiscal Policies
- Metal and Thin Film Mechanics
- Diverse Legal and Medical Studies
- Diamond and Carbon-based Materials Research
- Metal Alloys Wear and Properties
- Law and Political Science
- German Economic Analysis & Policies
- Corporate Governance and Law
- Advanced materials and composites
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Economic and Business Studies
- Corporate Social Responsibility and Sustainability
- Decision-Making and Behavioral Economics
- Catalytic Cross-Coupling Reactions
- Digital Innovation in Industries
- Organometallic Complex Synthesis and Catalysis
- Banking stability, regulation, efficiency
- Public Administration and Political Analysis
- Catalytic C–H Functionalization Methods
- Risk and Portfolio Optimization
- Risk and Safety Analysis
- Credit Risk and Financial Regulations
- Palliative Care and End-of-Life Issues
BASF (Germany)
2003-2024
University of Mannheim
1994-2023
Leibniz University Hannover
2022
University of Regensburg
2021
Fraunhofer Institute for Surface Engineering and Thin Films
2010-2020
Universitätsmedizin Göttingen
2018
University of Göttingen
1992-2018
Fraunhofer Society
2013-2014
University of Wisconsin–Madison
2012
Universität Hamburg
1994-2006
Pd(OAc)2/Bu4NBr/K2CO3 and dimethylformamide - these are the reaction conditions under which norbornene reacts selectively with three molecules of iodobenzene to give hydrocarbon 1 containing a 4-phenyl-9,10-dihydrophenanthrene moiety annelated norbornane framework. Photocyclization two dehydrogenation steps transform in high yield into norbornene-annelated benzo[e]pyrene 2. Analogous domino Heck couplings were also observed deltacyclene, indene, [2.2]paracyclophane-l,9-diene.
Pd(OAc) 2 /Bu 4 NBr/K CO 3 und Dimethylformamid , das sind die Reaktionsbedingungen, unter denen Norbornen selektiv mit drei Molekülen Iodbenzol zu dem Kohlenwasserstoff 1 einer an ein Norbornangerüst anellierten 4‐Phenyl‐9,10‐dihydrophenanthren‐Einheit reagiert. Photocyclisierung zwei Dehydrierungen wandeln in hoher Ausbeute Norbornen‐anellierte Benzo[ e ]pyren um. Analoge Domino‐Heck‐Kupplungen wurden auch Deltacyclen, Inden [2.2]Paracyclophan‐1,9‐dien beobachtet. magnified image
Heating [Ru3(CO)11(PPh3)] in toluene yields complexes [Ru4(CO)11(µ4-η4-C6H4)] and [Ru5(CO)13(µ4-PPh)(µ5-η6-C6H4)], structurally identified by X-ray diffraction, which benzyne is co-ordinated at tetra-and penta-ruthenium centres respectively; the latter provides a model for dissociative chemisorption of benzene step site on metal (111) surface.
The efficiency offorging processes is significantly influenced by the tool and scrap costs whichin their turn depend on life time of forging dies. tools used for hotforging are subject to process-related high mechanical, tribological, chemicaland thermal-cyclic loads which usually interact with each other. In comparisonto other manufacturing methods, resulting load spectrum leads extensivewear thus failure dies after a short life. Toincrease wear resistance dies, duplex treatments consisting...
During forming operations the contact conditions relating to surface of tools, intermediate coolant or lubricant and hot work piece material are determining flow resulting wear. The possibilities for an optimization tool surfaces aspects various scientific activities IST IFUM subject this paper. Tools typically made working steel can be treated with different technologies in order achieve wear resistant properties. First all, is mainly determined by its topography which defined manufacturing...
Does frequent outperformance cause investors to buy? If so, do have a preference outperform most of the time, or does bias beliefs about risk and return an asset? In several randomized experiments, we show that retail purchase frequently outperforming assets, even at cost large infrequent underperformance when assets are first-order stochastically dominated. An experiment with asset management professionals confirms fraction financial intermediaries anticipates investors' attraction...
We report experiments and analysis of field emission from metallic knife-edge cathodes, which are sputter-coated with thin films lanthanum hexaboride (LaB6), a low-work function material. The current is found to depend sensitively on the thickness LaB6 layer. find that thinner than 10 nm greatly enhance emitted current. However, cathodes coated thicker layer observed emit less uncoated cathode. This result unexpected due higher work bare metal show, based numerical calculation electrostatic...
Polymers are very often coated with a hard film to increase their scratch resistance. However, this coating entails the embrittlement of whole system due crack formation in brittle followed by an alleviating propagation into polymeric substrate. It is shown that impact strength depends on toughness coating, polymer, and property interface. In paper resistance was measured needle test data were converted failure map.
Domino coupling products of haloarenes and norbornene as well dicyclopentadiene can be converted to polycyclic aromatic compounds like benzo[e]pyrene (3), benzo[e]cyclopenta[I]pyrene (4), 7-phenyl-1H-cyclopenta[I]phenanthrene (10) 1H-cyclopenta[f][3,8]phenanthroline (16). Compounds 4 10 serve new ligands in metal complexes such ferrocenes 17, 18a titanocene 18b.
Abstract A series of molecular group 2 polyphosphides has been synthesized by using air‐stable [Cp*Fe(η 5 ‐P )] (Cp*=C Me ) or white phosphorus as polyphosphorus precursors. Different types reagents such organo‐magnesium, mono‐valent magnesium, and calcium hydride complexes have investigated to activate these sources. The organo‐magnesium complex [( Dipp BDI−Mg(CH 3 )) ] ( BDI={[2,6‐ i Pr C 6 H NCMe] CH} − reacts with give an unprecedented Mg/Fe‐supramolecular wheel. Kinetically controlled...
Hot forging is an effective production method producing safety relevant parts with excellent mechanical properties. The economic efficiency directly depends on the occurring wear of tools, which limits service lifetime. Several approaches presenting research group aim at minimizing caused by interacting and thermal loads using enhanced nitriding technology. Thus, modifying surface zone layer it possible to create a resistance against softening provoking plastic deformation pronounced...