Silicon Chemistry de Ulrich Schubert

Silicon Chemistry

Ulrich Schubert

Silicon and silicon compounds have contributed decisively to the technical progress. Technical applications range from mass commodities to highly sophisticated special materials, from ceramics to polymers, from medicine to microelectronics. To keep pace with scientific and technical developments Germany and Austria have established national priority programs, strongly linked to each other as well as to some Swiss groups.At mid-term of the German program and the end of the first funding period of the Austrian program the results are summarized in this special edition of the journal Monatshefte für Chemie/Chemical Monthly, giving an excellent overview of the current chemical (and partly physical) acitivites in the joint Austrian/German/Swiss program.The contributions cover topical and interdisciplinary developments in the following areas:• new phenomena in compounds with Si-Si bonds: transitions between molecular compounds and solids, cyclosilanes, polysilanes, silicides, amorphous hydrogenated silicon,• novel silicon-oxygen systems: functionalized sol-gel compounds, spherosiloxanes, siloxene, • compounds with low- and high-coordinated silicon,• new spectroscopic and analytical techniques for the characterization of molecular and polymeric silicon compounds.

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Cuprins

Carbosilane Dendrimers — Synthesis, Functionalization, Application.- Synthesestrategien zur Darstellung von unterschiedlich funktionalisierten Cyclosiloxanen sowie Additions- und Substitutionsreaktionen eines A14(OH)4-Achtringes in einem molekularen Oligoalumosiloxan.- Structure Determining Effect of Alcohols and Water on the Shape of the Hydrogen Bonded Network in Adducts with (9-Methyl-fluoren-9-yl)-silanetriol.- Silsesquioxane Chemistry II. Tin(IV) and Hafnium(IV) Compounds of Silsesquioxanes.- Photolumineszenzeigenschaften von substituierten Silsesquioxanen der Zusammensetzung Rn(SiO1.5)n.- Gezielte Synthese siloxenähnlicher Polymere.- Preparation and Characterization of Epitaxial CaSi2 and Siloxene Layers on Silicon.- Synthesis of Alkoxysilyl Substituted Cyclophosphazenes and their Properties in the Sol-Gel Process.- A Zwitterionic ?5Si-Silicate with an Almost Ideal Square-Pyramidal Si Coordination Polyhedron: Synthesis and Crystal Structure Analysis.- Preparation and Structure of l-(Trifluoro-methyl)silatrane.- Hexacoordinate Silicon-Azomethine Complexes: Synthesis, Characterization, and Properties.- Hexa(amino)disilanes with Saturated Cyclic Amino Ligands.- Synthesis and Structure of P7[Si(SiMe3)3]3 (Tri(hypersilyl)heptaphosphanortricyclane).- Solid-State Molecular Dynamics of (Ph3Si)Si(SiMe3)3 Studied by Variable Temperature 13C and 29Si MAS NMR Spectroscopy.- Reactions of a Cyclotrisilane with Chalcogen Transfer Reagents.- Zur Charakterisierung von Si-Polymerèn durch flüssigchromatographische Verfahren in Kopplung mit MALDI-TOF-MS.- Phase Behaviour of Poly(di-n-decylsilane).- Synthese, Funktionalisierung und Vernetzung von Poly(silylenphenylenen).- Sr12Mg17.8Li2.2Si20, die erste Zintl-Phase mit einer Si3-Kette.- Oligosilylanions and their Reactions withZirconocene and Hafnocene Dichlorides.- Transition Metal Silyl Complexes LVIII. Silyl Group Exchange between (R3“P)2Pt(SiR3)2und HSiR’3.- Group IV Metallocene Bis(trimethylsilyl)acetylene Complexes as Catalysts in the Dehydrocoupling Polymerization of 1,2-Disubstituted Hydrodisilanes.- Deposition of Amorphous Hydrogenated Silicon (?-Si:H): in situ Gas Analysis by Time-of-Flight Mass Spectrometry.- Reaktion von atomarem Silicium mit Methanol: Matrixspektroskopische Identifizierung von Methoxysilylen.- Zum Spreitverhalten von Mischungen definierter Trisiloxantenside auf niederenergetischen Oberflächen.