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Mostrando ítems 61-70 de 98
Artículo
Synthesis and reactivity of half-sandwich (η 5 -C 5 Me 5 )Ir(iii) complexes of a cyclometallated aryl phosphine ligand
(Royal Society of Chemistry, 2011)
Reaction of the Ir(iii) dimer [(η 5 -C 5 Me 5 )IrCl 2 ] 2 with PMeXyl 2 (Xyl = 2,6-C 6 H 3 Me 2 ), in the presence of the poorly coordinating base 2,2,6,6-tetramethyl piperidine, gives a chloride complex 1-Cl, resulting ...
Artículo
Application of Phosphine-Phosphite Ligands in the Iridium Catalyzed Enantioselective Hydrogenation of 2-Methylquinoline
(Multidisciplinary Digital Publishing Institute, 2010-10-29)
The hydrogenation of 2-methylquinoline with Ir catalysts based on chiral phosphine-phosphites has been investigated. It has been observed that the reaction is very sensitive to the nature of the ligand. Optimization of the ...
Artículo
Electronic and structural effects of low-hapticity coordination of arene rings to transition metals
(American Chemical Society, 2014)
A DFT computational study and a structural analysis of the coordination of arenes to transition metals in low -hapticity (η1 and η2) modes have been developed, including a pseudosymmetry analysis of the molecular orbitals ...
Artículo
1,2,3-Triazoles from carbonyl azides and alkynes: filling the gap
(Royal Society of Chemistry, 2014)
Electron deficient azides are challenging substrates in CuAAC reactions. Particularly, when N-carbonyl azides are applied the formation of N-carbonyl triazoles has not yet been observed. We report herein the first example ...
Artículo
The Oxy-CaL process: A novel CO2 capture system by integrating partial oxy2 combustion with the Calcium-Looping process
(Elsevier, 2017)
This paper proposes a novel CO2 capture technology from the integration of partial oxy18 combustion and the Calcium Looping capture process based on the multicycle 19 carbonation/calcination of limestone derived CaO. The ...
Artículo
Structural and chemical reactivity modifications of a cobalt perovskite induced by Sr-substitution. An in situ XAS study
(Elsevier, 2015)
LaCoO3 and La0.5Sr0.5CoO3-δ perovskites have been studied by in situ Co K-edge XAS. Although the partial substitution of La(III) by Sr(II) species induces an important increase in the catalytic oxidation activity and ...
Artículo
Oxidation of CO over gold supported on Zn-modified ceria catalysts
(Elsevier, 2011)
A series of Zn-modified ceria solids were prepared by thermal decomposition of the corresponding metal propionates. The formation of segregated ZnO particles on the ceria surface is evidenced for these solids using X-ray ...
Artículo
An Unsaturated Four-Coordinate Dimethyl Dimolybdenum Complex with a Molybdenum–Molybdenum Quadruple Bond
(John Wiley & Sons, 2017)
We describe the synthesis and the molecular and electronic structures of the complex [Mo2Me2{μ‐HC(NDipp)2}2] (2; Dipp=2,6‐iPr2C6H3), which contains a dimetallic core with an Mo–Mo quadruple bond and features uncommon ...
Artículo
Surface oxygen vacancies in gold based catalysts for CO oxidation
(RSC Publishing, 2014)
Experimental catalytic activity measurements, Diffuse Reflectance Infrared Fourier Spectroscopy, and Density Functional Theory calculations are used to investigate the role and dynamics of surface oxygen vacancies in the ...
Artículo
Structural and kinetic study of phase transitions in LaYSi 2O 7
(Elsevier, 2012-08)
Phase transitions in LaYSi 2O 7 have been investigated as a function of temperature using XRD, NMR and TEM. Previously described empirical crystal structure guidelines based on average cation radius in rare-earth RE 2Si ...