Rhodium Complexes
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Hidroformilação do oleato de metila catalisada por complexos de ródio
In this work, we describe the hydroformylation of methyl oleate catalyzed by several rhodium complexes. Parameters including total pressure, phosphorous/rhodium and CO/H2 ratio, temperature and phosphorous ligands were scanned. Total conversion of the starting double bonds was achieved while maintaining excellent selectivity in aldehydes.
Quím. Nova. Publicado em: 2012
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2. Activity and sulfur resistance of Rh(I) and Pd(II) complexes
Two complexes of Rh(I) and Pd(II) with chloride and tridecylamine ligands were obtained and characterized by Elementary Analysis and by XPS and FTIR spectroscopies. Complexes anchored on γ-Al2O3 were tested in the styrene semi-hydrogenation reaction carried out in the absence or presence of a sulfur poison. Although both low loaded catalysts were highly sel
Química Nova. Publicado em: 2011
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3. Asymmetric transfer hydrogenation of ketones in aqueous solution catalyzed by rhodium(III) complexes with C2-symmetric fluorene-ligands containing chiral (1R,2R)-cyclohexane-1,2-diamine
Dois ligantes C2-simétricos bis(sulfonamide) contendo o fluoreno-quiral (1R,2R)-ciclohexano-1,2-diamina foram complexados com RhIII(Cp*) e usados como catalizador para redução aromática de cetonas. Os alcoois secundários correspondentes foram obtidos com ee 87-100% e rendimento de 85-99%, sob condições de transferência de hidrogenio assimétrica (THA
Journal of the Brazilian Chemical Society. Publicado em: 2010
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4. Álcoois quirais: métodos químicos e catalíticos de obtenção por redução assimétrica
The importance of chiral alcohols as starting materials for the production of fine chemicals and as useful chirons for the building of several interesting molecules or natural products is reported. The useful and common methods of asymmetric reduction such as the chemical (with organoboron or organoaluminum reagents) and the catalytic ones (with ruthenium or
Química Nova. Publicado em: 2003-01
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5. Effects of human serun albumin in some biological properties of rhodium(II) complexes
Cinco complexos de ródio(II) de fórmula geral [Rh2(ponte)4] (ponte = acetato, propionato, butirato, trifluoroacetato e trifluoroacetamidato) tiveram suas afinidades em relação à albumina humana (HSA) determinadas por espectrofotometria, observando-se no caso dos alquilcarboxilatos uma correlação inversa com suas lipossolubilidades. A difusão dos comp
Journal of the Brazilian Chemical Society. Publicado em: 2000-10
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6. Interaction of rhodium(II) complexes with human serum albumin / Interações de Complexos de Ródio(II) com Albumina Humana
Vários complexos de ródio Rh2(L)4 (L = acetato, propionato, butirato, trifluoroaceta-to e trifluoroacetamidato) ligam-se à albumina de soro humana (HSA) em relações mola-res de aproximadamente 8:1. Medidas de dicroísmo circular mostraram que os carboxila-tos mais lipossolúveis (butirato e trifluoroacetato) provocaram as maiores alterações na estrutu
Publicado em: 2000
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7. Antibiotic Action of N-Methylthioformohydroxamate Metal Complexes
The antibiotic activity of metal complexes of N-methylthioformohydroxamic acid against gram-negative Escherichia coli NIHJ and gram-positive Staphylococcus aureus 209P was investigated. The kinetically labile, square-planar, divalent (Cu, Ni, and Pd) and octahedral, trivalent (Fe, Co, and Cr) complexes displayed activity, whereas the more inert platinum(II)
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8. Effects of cis-Dichlorodiammineplatinum (II) and Related Transition Metal Complexes on Escherichia coli
A number of transition metal complexes, including the cis and trans isomers of dichlorodiammineplatinum (II), six complexes of rhodium (I), two of iridium (I), and one of ruthenium (II) have been tested for their ability to induce lambda prophage, to produce filamentous growth of Escherichia coli, and to be selectively toxic for strains with defects in the d
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9. Structure of transition-metal cluster compounds: Use of an additional orbital resulting from the f, g character of spd bond orbitals*
A general theory of the structure of complexes of the transition metals is developed on the basis of the enneacovalence of the metals and the requirements of the electroneutrality principle. An extra orbital may be provided through the small but not negligible amount of f and g character of spd bond orbitals, and an extra electron or electron pair may be acc
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10. Alkyl-metal and aryl-metal bond chemistry in coordinately unsaturated polynuclear metal complexes
A new class of coordinately unsaturated polynuclear rhodium and iridium alkyl, benzyl, and aryl derivatives of the form [RM(1,5-cyclooctadiene)]x have been prepared by the reaction of the organolithium reagent with the cyclooctadienemetal chlorides at -78°C. The x-ray crystal structure of [μ-CH3Rh (1,5-cyclooctadiene)]2 is reported. The analogous iridium d
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11. Fast photoinduced electron transfer through DNA intercalation.
We report evidence for fast photoinduced electron transfer mediated by the DNA helix that requires metal complexes that are avid intercalators of DNA. Here the donor bis(phenanthroline)(dipyridophenazine)ruthenium(II) [Ru(phen)2dppz2+] and acceptor bis(9,10-phenanthrenequinone diimine)(phenanthroline)rhodium(III) [Rh(phi)2phen3+] intercalate into DNA with Kb