Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 15 of 15 for “"Co2(CO)8"”.
-
Darstellung, Eigenschaften und Reaktivität von Carbonylclusterkomplexen mit flächenüberbrückenden Cyclooctatetraen-Liganden
… sich mit Clusterkomplexen der Übergangsmetalle Cobalt und Rhodium mit facialen Cyclooctatetraen(cot)-Liganden. Es werden Reaktionen von [Co2(CO)8], [Rh4(CO)12], [Co3Rh(CO)12] bzw. [Co2Rh2(CO)12] mit cot und bis-Trimethylsilyl-cyclooctatetraen (Si2cot) (Gemisch der 1,4- und 1,6-Isomeren) …
-
Synthesis of P-Stereogenic Bisphosphine Ligands: Application as Hemi-labile Ligands in the Asymmetric Pauson-Khand Reaction
… ligands and investigation of their use in a Co-catalysed asymmetric Pauson-Khand reaction has been carried out. The ligands were synthesised by asymmetric lithiation of a phosphine sulfide or a phosphine borane using alkyllithium/()-sparteine complexes, trapping with Ph2PCl or t-Bu2PCl and …
-
Deposition of Metal Oxides and Metal Carbonyls on Silicon Surfaces Using Solution Chemistry
The Si-H bonds on the H-Si(111) surface and Co2(CO)8 in n-heptane solution reacted to form a well defined submonolayer coverage of Co(CO)4 above the surface plane of Si(111). Transmission Fourier-transform infrared spectroscopy analysis of (OC) 4Co-Si(111) yielded structural and geometric …
-
Asymmetrische Synthese von bicyclischen Alpha-Aminosäuren durch intramolekulare Pauson-Khand-Reaktion von l-Alkenylsulfoximinen und Festphasensynthese mit Allylsulfoximinen
… allylic sulfoximines could easily be prepared in 55-70% yield following a well established addition elimination isomerization route. A regio and diastereoselective allylation of N-tert-Butysulfonyliminoester with titanated allylic sulfoximines led to …
-
Eisenfragment-substituierte Silanole, Silylamine und Heterosiloxane von Aluminium, Gallium und Indium
… werden. Als alternativer Zugang findet sich der Co2(CO)8-katalysierte H/OH-Austausch an den Ferrio-silanen 3a,b in Gegenwart von Wasser. Der als Zwischenstufe postulierte, zweikernige Komplex Cp(Me3P)2Fe- Si(Me)(p-Tol)Co(CO)4 (5) kann durch Reaktion des Ferrio-silans 3b mit Co2(CO)8 erhalten …
-
Complexation of Block Copolysiloxanes with Cobalt Nanoparticles
… (PDMS-b-PMVS) diblock copolymers were synthesized via anionic living polymerization with controlled molecular weights and narrow molecular weight distributions. Targeted molecular weights agreed well with experimental values determined by 1H NMR, 29Si NMR, and GPC. …
-
Cobalt Nanoparticle-Macromolecular Complexes and Their Conversion to Oxidatively Stable Entities
… would afford oxidative stability to magnetic cobalt nanoparticles under ambient conditions. The cobalt nanoparticles were formed via the thermolysis of Co2(CO)8 in concentrated solutions of toluene containing the macromolecular dispersion stabilizers. The copolymers were designed to …
-
Zweifach Eisen-substituierte Silane, Silanole und Siloxane
… oder HSiCl2Me mit den Übergangsmetallaten Na[Fe(CO)2Cp] oder Li[W(CO)2PMe3Cp] wurden verschiedene bismetalliete Silane [LnM]2SiRCl (R = H, Me) aufgebaut. Durch weitere Derivatisierung konnten u.a. die Bis(ferrio)silane [Cp(OC)2Fe]2SiX2 (X = F, Cl, Br, I) dargestellt und z. T. durch …
-
CVD of magnetic iron-cobalt alloy thin films: surface poisoning from carbonyl precursors and use of ammonia as a chemical inhibitor to restore growth kinetics
Iron-cobalt alloys are excellent soft ferromagnetic materials that are widely used in data storage applications such as writer heads for hard disc drives and magnetic tunnel junctions in spin-transfer torque magnetic random-access memories. Although the FexCo(1-x) alloys in such devices are …
-
Avances en la química de coordinación de los tetrilenos pesados
… en el campo de la Química Inorgánica y, más concretamente, en el de la química que asocia los metales de transición (Ms) con los parientes más pesados de los carbenos, conocidos comúnmente como tetrilenos pesados (TPs) o metalilenos. Su formato es el de ¿Compendio de Publicaciones¿ y contiene …
-
Cobalt catalysts towards parahydrogen induced polarization
… and nuclear magnetic resonance (NMR) spectroscopy are two techniques that hold great importance to the fields of medicine and chemistry, respectively. Used daily by researchers and medical practitioners alike, these techniques provide critical diagnostic information for molecular structure …
-
Auf dem Wege zu einem Disilin RSi≡SiR Supersilylierte Silane, Silanide, Silylene, Disilene
… mit Isobuten unter En-Reaktion und mit Co2(CO)8 unter Bildung eines neuartigen Grundkörpers. Beispiele für [2+1]-Cycloadditionen liefern Reaktionen mit N2O, O2, Te, Me3SiN3, tBuNC. Beispiele für [2+2]-Cycloadditionen sind Reaktionen mit PhCHO, Ph2CS, CO2, COS, Beispiele für …
-
Nucleation inhibition and enhancement in chemical vapor deposition
Area selective deposition (ASD) is becoming increasingly attractive as a bottom-up approach to nanomanufacturing. Most ASD processes developed so far concern selective deposition of metal on metal (i.e., not on non-metallic surfaces) or oxide on oxide (i.e., not on metallic surfaces), but …
-
Functionalized nido-C4B2, closo-C2B5 and -C2B10 Carboranes, and Reactivity Studies on Electron-Poor 2,3-Dihydro-1,3-diborolyl Complexes of Ruthenium
… describes work on organoborane/carborane compounds (Chapters 3.1, 3.2, 3.3, 3.5), on the reactivity of 2,3-dihydro-1,3-diborolyl complexes of ruthenium (3.4), and on aminoborane derivatives (3.6). In Chapter 3.1, a one-pot synthesis of 1,6-diiodo-2,3,4,5-tetracarba-nido-hexaborane(6) …
-
Fabrication and Characterization of Three-Dimensional Magnetic Nanostructures
… This thesis achieves three key points to overcome these fabrication and characterization challenges: improving the understanding and control of 3D nano-printing of cobalt nanostructures using Focused Electron Beam Induced Deposition (FEBID), improving the performance of synchrotron-based …