Large-scale oxidations in the pharmaceutical industry.

Atomic clusters, consisting of a few to a few thousand atoms, have emerged over the past 40 years as the ultimate nanoparticles, whose structure and properties can be controlled one atom at a time. One of the early motivations in studying clusters was to understand how the properties of matter evolve as a function of size, shape, and composition. Over the past few decades, more than 200 000 papers have been published in this field. These studies have not only led to a considerable understanding of this evolution from clusters to crystals, but also have revealed many unusual size-specific properties that make cluster science an interdisciplinary field on its own, bridging physics, chemistry, materials science, biology, and medicine. More importantly, the possibility of creating a new class of materials, composed of clusters instead of atoms as building blocks, has fueled the hope that one can synthesize materials from the bottom-up with unique and tailored properties. This Review focuses on the properties ...

Super Atomic Clusters: Design Rules and Potential for Building Blocks of Materials

Synthesis and Structure of a Monomeric Aluminum(I) Compound [{HC(CMeNAr)2}Al] (Ar=2,6–iPr2C6H3): A Stable Aluminum Analogue of a Carbene

Structurally Diverse pi-Cyclopentadienyl Complexes of the Main Group Elements.

The Chemistry of Aluminum(I), Silicon(II), and Germanium(II)

Hexameric Aggregates in Crystalline (Pentamethylcyclopentadienyl)gallium(I) at 200 K

Synthesis and Crystal Structure of the Tetraaluminatetrahedrane Al4[Si(t-Bu)3]4, the Second Al4R4 Compound

A metastable AlCl solution obtained by co-condensation of the high-temperature molecule AlCl and a mixture of toluene/diethyl ether reacted with SiCp*2 or SiCl4/AlCp*, giving a unique SiAl14 cluster species that bears six Cp* ligands protecting the compound from disproportionation and formation of the bulk material (elemental Al or an Si/Al alloy). The structure of the SiAl14 core represents a section of the body-centered packing where a Si atom resides in the center of an Al cube. Each of the six faces of the cube is capped by an additional Al(η5 Cp*) moiety. This cluster compound was investigated by mass spectrometry, X-ray diffraction, 27Al NMR spectroscopy, and ab initio theory. The solid-state structure contains minor amounts of molecules with additional Cl atoms bonded to the Al atoms at the corners of the cube, and the presence of Cl-containing molecules in the crystal is rationalized on basis of the suggested reaction path.

Synthesis and Structure of a Neutral SiAl14 Cluster

Hexamere Aggregate in kristallinem (Pentamethylcyclopentadienyl)gallium(I) bei 200 K

Pentabenzylcyclopentadienides of Lithium

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