Synthesis, Properties and Structural Characterization of Novel Oxo, Nitrido Molybdenum Compounds with Alkoxy and Siloxy Ligands

Synthesis, Properties and Structural Characterization of Novel Oxo, Nitrido Molybdenum Compounds with Alkoxy and Siloxy Ligands PDF Author: Gyu Shik Kim
Publisher:
ISBN:
Category : Molybdenum compounds
Languages : en
Pages : 392

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Synthesis, Properties and Structural Characterization of Novel Oxo, Nitrido Molybdenum Compounds with Alkoxy and Siloxy Ligands

Synthesis, Properties and Structural Characterization of Novel Oxo, Nitrido Molybdenum Compounds with Alkoxy and Siloxy Ligands PDF Author: Gyu Shik Kim
Publisher:
ISBN:
Category : Molybdenum compounds
Languages : en
Pages : 392

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Dissertation Abstracts International

Dissertation Abstracts International PDF Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 770

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Synthesis, Chemical and Structural Characterization of Molybdenum -hydrazido (2- ) Complexes with Tridentate Thiolate Ligands

Synthesis, Chemical and Structural Characterization of Molybdenum -hydrazido (2- ) Complexes with Tridentate Thiolate Ligands PDF Author: Lisa M. Throop
Publisher:
ISBN:
Category : Molybdenum compounds
Languages : en
Pages : 80

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Faculties, Publications, and Doctoral Theses in Chemistry and Chemical Engineering at United States Universities

Faculties, Publications, and Doctoral Theses in Chemistry and Chemical Engineering at United States Universities PDF Author: American Chemical Society. Committee on Professional Training
Publisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 1646

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Synthesis of Molybdenum and Tungsten Oxo and Imido Alkylidene NHC Complexes and Their Use in Stereoselective Ring-Opening Metathesis Polymerization

Synthesis of Molybdenum and Tungsten Oxo and Imido Alkylidene NHC Complexes and Their Use in Stereoselective Ring-Opening Metathesis Polymerization PDF Author: Mathis Benedikter
Publisher: Cuvillier Verlag
ISBN: 3736963947
Category : Science
Languages : en
Pages : 306

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Im Rahmen der Dissertation wurden unterschiedliche Aspekte der Olefinmetathese mit Molybdän- und Wolframbasierten Katalysatoren untersucht. Zunächst wurde die Eignung von Molybdän Imido Alkyliden N-heterocyclischen Carben (NHC) Komplexen als Initiatoren für die ringöffnende Metathese-Polymerisation (ROMP) erforscht. Durch Einsatz von chiralen, enantiomerenreinen Norbornenderivaten als Monomer konnte gezeigt werden, dass mit diesen Komplexen selektiv trans-isotaktische Polymere hergestellt werden können. Die beobachtete Selektivität ist dabei stark abhängig von der Ligandensphäre. Des Weiteren konnte vollständig hydriertes, syndiotaktisches Polydicyclopentadien hergestellt und erstmals mittels Schmelzspinnen zu Fasern versponnen werden. Ein weiterer Schwerpunkt der Dissertation lag auf der Entwicklung neuer Katalysatoren für die Olefinmetathese. So wurde eine neue Syntheseroute zur Herstellung kationischer Wolfram Imido Alkyliden NHC Komplexen entwickelt. Durch Anpassung der Ligandensphäre konnten luftstabile kationische Molybdän und Wolfram Imido Alkyliden NHC Komplexe hergestellt werden, die hohe Produktivitäten in der Olefinmetathese von Substraten mit verschiedenen sauerstoff- und schwefelhaltigen funktionellen Gruppen zeigen. Schließlich konnte der erste Molybdän Oxo Alkyliden NHC Komplex hergestellt und charakterisiert werden.

Studies on Synthesis, Properties and Reactions of High-valent Oxo Molybdenum and Tungsten Complexes

Studies on Synthesis, Properties and Reactions of High-valent Oxo Molybdenum and Tungsten Complexes PDF Author: Fu-Min Su
Publisher:
ISBN:
Category : Metallic oxides
Languages : en
Pages : 166

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Synthesis and Characterization of Novel Intercalation Compounds of Molybdenum Trioxide and Molybdenum Disulfide

Synthesis and Characterization of Novel Intercalation Compounds of Molybdenum Trioxide and Molybdenum Disulfide PDF Author: Rabindranath Bissessur
Publisher:
ISBN:
Category : Molybdenum compounds
Languages : en
Pages : 566

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Synthesis and Structural Characterization of Some Novel Organo-group 13 Compounds

Synthesis and Structural Characterization of Some Novel Organo-group 13 Compounds PDF Author: Shahid Ul Ghazi
Publisher:
ISBN:
Category :
Languages : en
Pages : 370

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Synthesis and Characterization of Novel Group VI Metal (Mo, W) Nitride and Oxide Compounds

Synthesis and Characterization of Novel Group VI Metal (Mo, W) Nitride and Oxide Compounds PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 53

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Investigations into the preparation of tungsten nitrides have involved the synthesis of molecular precursors, and their conversion to tungsten nitrides at relatively low temperatures. Two interesting molecular precursors, [WNCl3·NCCH3]4 and WN(N3)3·xNCCH3, have been prepared and characterized. The molecular structure of the first consists of a W4N4 tetrameric core with multiple and single W-N bonds arranged in an alternating fashion. Three new solid state phases, amorphous W3N5, cubic WN, and W2N2(C2N2), have been discovered by solid state and chemical vapor transport reactions. The structures have been investigated. A systematic study in the Ln2O3-MoO3-Mo (Ln = La, Ce, Pr, Nd, Sm) system has been explored to better understand LnMoO14. The study has shown that the sizes of the rare-earth cations affect the formation of these phases. Larger cations (La, Ce, and Pr) aid in the formation of trans-Mo bicapped octahedra, and the smaller cations (Nd, Sm) only stabilize the cis-Mo8 bicapped octahedra. Magnetic susceptibility measurements have indicated that no effective moment contribution arises from the Mo8 metal clusters, even though the cis-Mo8 cluster in LnMo8O14, containing all cis-Mo8 octahedra, apparently contains an odd number of electrons (23). Electrical resistivity measurements and electronic structure calculations have shown that the LnMo8O14 compounds containing cis-Mo8 clusters are metallic, and the LnMo8O14 compounds containing a 1:1 ratio of cis- to trans-Mo8 clusters are semiconducting.

Synthesis, Characterization, and Theoretical Investigations of Several Organometallic Molybdenum Compounds

Synthesis, Characterization, and Theoretical Investigations of Several Organometallic Molybdenum Compounds PDF Author: Diana Rose Tomchick
Publisher:
ISBN:
Category :
Languages : en
Pages : 542

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