Studies on Hydrogenolysis. XXIV-XXV. XXV. Catalytic Hydrogenolysis of Diaralkyl Ethers

Selective, nickel-catalyzed hydrogenolysis of aryl ethers.

Selective hydrogenolysis of the aromatic carbon-oxygen (C-O) bonds in aryl ethers is an unsolved synthetic problem important for the generation of fuels and chemical feedstocks from biomass and for the liquefaction of coal. Currently, the hydrogenolysis of aromatic C-O bonds requires heterogeneous catalysts that operate at high temperature and pressure and lead to a mixture of products from com...

Catalytic enantioselective hydrogenolysis of [Cr(CO)3(5,8-dibromonaphthalene)].

Highly enantiomerically enriched (h-arene)tricarbonylchromium(0) complexes whose chirality originates from the 1,2disubstitution pattern of the arene and the coordination of the metal to one enantiotopic face of the arene are powerful chirons in asymmetric synthesis. Robust, planar chiral arene complexes also increasingly find application as chiral ligands in asymmetric catalysis. Enantiomerica...

Transactions on Computational Collective Intelligence XXV

Xxv. Linguistics Academic and Research Staff

There have been two main traditions in the study of language in modern times. The first is the tradition of "universal" or "philosophical grammar," which flourished in the seventeenth and eighteenth centuries in intimate connection with philosophy and speculative psychology. The second is the tradition of modern linguistics, a nineteenth and twentieth century phenomenon that was also closely in...

Oxidative phosphorylation in fractionated bacterial systems. XXV. Studies on the involvement of metal in Mycobacterium phlei.

The involvement of metal in oxidation and coupled phosphorylation by cell-free preparations of Mycobacterium phlei was examined. The oxidation of succinate was inhibited by metal-chelating agents, but with /3-hydroxybutyrate, chelating agents exhibited an uncoupling effect. The site of inhibition was found to be between the flavoprotein and the cytochrome b regions of the electron transport cha...