نتایج جستجو برای: rhenium catalyst
تعداد نتایج: 45649 فیلتر نتایج به سال:
A rhenium-based photocatalyst enables the deoxygenation of several compounds containing N–O bonds, such as N2O and pyridine N-oxides.
UNLABELLED We proposed a new water-soluble rhenium diseleno-ether compound (with one atom of Re and two atoms of Se) and investigated the uptake of Re into the nucleus of malignant cells in culture exposed to the compound for 48 h and its efflux from the nucleus after a post-exposure period of 48 h, as DNA is the main target of Re. We also studied the distribution of both Re and Se in the main ...
Alkylation of sodium cyclopentadienyl(tricarbonyl)metal— lates of tungsten and molybdenum with o—chloro ketones and c—chloro esters gives stable tungsten and molybdenum enolates (23a—23d). Similar alkylation of sodium pentacarbonylrhenate provides rhenium enolates 24. Compounds 23 lOse carbon monoxide and rearrange to 3—oxaallyl complexes 25 upon irradia— tiøn. Compounds 25 react with benzaldeh...
In situ prepared lithium arylselenolates {LiSePh, LiSe(2,6-Me2Ph), LiSe(2,4,6-Me3Ph)} or -tellurolates {LiTePh, LiTe(2,6-Me2Ph), LiTe(2,4,6-Me3Ph)} react with [ReOCl3(PPh3)2] and (NBu4)Br in good yields under formation of rhenium(V) complexes the composition (NBu4)[ReO(L)4)]. The first oxidorhenium(V) complex four monodentate phenolato ligands, [ReO(2,6-Me2Ph)4]?, was isolated crystalline form....
On-demand production of hydrogen from ammonia is a challenge limiting the implementation as long term vector to overcome difficulties associated with storage. Herein, we present development catalysts for on-demand by combining metals high and low N-adatom adsorption energies. In this way, cobalt-rhenium (Co-Re) show activity mimicking that ruthenium. EXAFS/XANES analyses demonstrate bimetallic ...
This paper argues that innovation can be best understood as an information process which is then concretized as a product that meets demand. Two very different firms, Canon Inc. and Apple Computer Inc., are used as case study illustrations. Innovation does not proceed through logical deduction, but rather is furthered by the use of metaphors and analogies. The bureaucratic and staid structures ...
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