One S less: Recent crystallographic studies have revealed a new, oxygen-tolerant kind of iron–sulfide cluster [4Fe-3S], which contains only three rather than four sulfur atoms in its cage (see picture; yellow=S, red=Fe, blue=N, green=cysteine). It [...]
|
||||||
|
“… In the last 30 years, the chemistry prize was given 10 times for a discovery that is reasonably classified as biochemistry or molecular biology …” Read more in the Editorial by Roald Hoffmann on page [...] High-pressure conditions afford unique all-hydrido hypervalent complexes [SiH6]2− in the crystalline hydridosilicates A2SiH6 (A=K, Rb). Compared to normal-valent silanes the SiH bond appears considerably enlarged, by about 0.15 Å. Accordingly, SiH [...] DMA donates: Copper(II) acetate and 8-hydroxyquinoline promote the formation of a benzofuran core through a cascade of copper-catalyzed processes wherein the key carbon atom comes from the dimethylacetamide (DMA) solvent. Strong evidence for the [...] Clicking bugs: Metabolically active Gram-negative bacteria can specifically incorporate an azide-modified analogue of 3-deoxy-D-manno-octulosonic acid (1, see scheme) into the lipopolysaccharides on their membranes. This process adds a bioorthogonal [...] Dynamics and kinetics in a single stroke: The stereodynamics of the tropos-chiral diphosphine biphep and its 3,3′-dialkoxy analogues was investigated by enantioselective dynamic HPLC (DHPLC) and a novel three-column approach, in with the dynamics [...] Back in black: All metastable and stable phases can be identified for the solid solution arsenic/phosphorus by a combination of quantum-chemical calculations and investigations of the phase formation. Reaction paths for phase formations and [...] If I were not a scientist, I would be a chef or sommelier. My favorite place on earth is the summit of any [...] Rule of thumb: The high yielding title reaction is described with a focus on understanding the factors that govern the regioselectivity of the process (see scheme). Electronic, steric, and functional group properties all influence the selectivity, an [...] There and back again: Hydrogenation of esters and the reverse reaction of dehydrogenative coupling of alcohols are efficiently catalyzed by dimeric complexes of Ru and Os under neutral conditions. The Os dimer (see picture) is an outstanding catalyst [...] |
||||||
|
|
||||||