This work presents the combined results from an international research project involving 40 interdisciplinary groups. The first section of chapters deals with reactive molecular precursors and intermediates in silicon chemistry. The second and third sections show the way from molecular building blocks via oligomeric compounds to extended networks for several systems based on Si-O and Si-Si bonds. Some specific topics covered include reactions with matrix isolated SiO molecules, in situ diagnostics of amorphous silicon thin film deposition, chemistry of metalated oligosilanes, theoretical treatment of silicon clusters, and functionalized silanols and silanolates. The book is for silicon chemists working in organic, inorganic, physical, or polymer chemistry, materials science, and physics.