Browsing by Title Artículos de revistas
Now showing items 501-520 of 2801
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(1998)The 1H and 13C NMR spectra of 2-phenyl-3H-naphtho[2,1-b][1,4]oxazin-3-one, 2-p-methoxyphenylnaphtho[1,2-d]oxazole and 2-phenylnaphtho[1,2-d]oxazole were totally assigned using a combination of one-and two-dimensional NMR ...
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(JOHN WILEY & SONS LTD, 2000-02)The H-1 and C-13 NMR spectra of a set of structurally related tricyclic quinones consisting of 4,4-dimethylanthracene-1,9,10(4H)-trione (1), 4,4,6,7-tetramethylanthracene-1,9,10(4H)-trione (2) and the regioisomers 4,4,5- ...
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(JOHN WILEY & SONS LTD, 1999-04)The regiosomeric quinones 5-acetyloxymethyl-4,4,8-trimethyl- (5) and 8-acetyloxymethyl-4,4,5-trimethylanthracene-1,9,10(4H)-trione (6) were synthesized and their regiochemistry was assigned on the basis of the unambiguous ...
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(JOHN WILEY & SONS LTD, 1998-06)The H-1 and C-13 NMR spectra of 2-phenyl-3H-naphtho[2,1-b][1,4]oxazin-3-one, 2-p-methoxyphenylnaphtho[1,2-d]oxazole and 2-phenylnaphtho[1,2-d]oxazole were totally assigned using a combination of one-and two-dimensional NMR ...
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(2006)The anabaseine derivatives 6-methoxy-7-hydroxy-1-(pyridin-3-yl)-3,4- dihydroisoquinoline, 6,7-dimethoxy-1-(pyridin-3-yl)-1,2,3,4- tetrahydroisoqumoline and 6,7-dimethoxy-1-(piperidin-3-yl)-1,2,3,4- tetrahydroisoquinoline ...
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(JOHN WILEY & SONS LTD, 2006-12)The anabaseine derivatives 6-methoxy-7-hydroxy-1-(pyridin-3-yl)-3,4-dihydroisoquinoline, 6,7-dimethoxyl-(pyridin-3-yl)-1,2,3,4-tetrahydroisoquinoline and 6,7-dimethoxy-1-(piperidin-3-yl)-1,2,3,4-tetrahydroisoquino- line ...
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(2003)The oxoisoaporphines 2,3-dihydro-7H-dibenzo[de,h]quinolin-7-one, 2,3-dihydro-5-methoxy-7H-dibenzo [de,h] quinolin-7-one, 5-methoxy-6-hydroxy-2,3-dihydro-7H-dibenzo[de,h]quinolin-7-one, 5,6-dimethoxy-2,3-dihydro-7H-dibenz ...
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(Elsevier, 1998)The I3- salts soluble in acetone and sparingly so in methanol, and I3- inhibits formation of Co(II) so that minor decomposition of acomplex does not broaden its 1H NMR signals. The (phen)2 complex of Co(III) with D-glucosamine ...
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(SPRINGER, 2010-10)For first time the complexation of bentazon (Btz) with native b-cyclodextrin (b-CD) and modified sulfobutylether- b-CD (SBE-CD) was studied by differential pulse voltammetry. In addition, a spectrophotometry UV–Visible study ...
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(2010)For first time the complexation of bentazon (Btz) with native β-cyclodextrin (β-CD) and modified sulfobutylether-β-CD (SBE-CD) was studied by differential pulse voltammetry. In addition, a spectrophotometry UV-Visible study ...
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(Sociedad Chilena de Química, 1997)D-β-Mannosamine reacts with cobalt(III) bis-phenanthroline to form a single 1:1 complex with the ∆ configuration at Co(III) which can be isolated as the stable triiodide salt.
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(PERGAMON-ELSEVIER SCIENCE LTD, 2008-11-01)Properties of inclusion complexes between morin (M) and beta-cyclodextrin (beta CD), 2-hydroxypropyl-beta-cyclodextrin (HP beta CD) and Heptakis (2,6-O-di methyl) beta-cycloclextrin (DM beta CD) such as aqueous solubility ...
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(2008)Properties of inclusion complexes between morin (M) and β-cyclodextrin (βCD), 2-hydroxypropyl-β-cyclodextrin (HPβCD) and Heptakis (2,6-O-di methyl) β-cyclodextrin (DMβCD) such as aqueous solubility and the association ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2007-05)The slightly water-soluble flavonoid quercetin (QUE) and its inclusion with either beta-cyclodextrin (beta CD), hydroxypropyl-beta-cyclodextrin (HP-beta CD) or sulfobutyl ether-beta-cyclodextrin (SBE-beta CD) were investigated. ...
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(ELSEVIER SCI LTD, 2000-10-20)The Delta-[Co(III)bis(phenanthroline)(sucrose)](3+) complex forms with little perturbation of the sucrose conformation, and complexation by HO-2(g) and HO-1(f).
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(ELSEVIER SCIENCE BV, 1995-12-20)L-Sorbose and two molecules of 1,10-phenanthroline form a complex with Co(III) which has the Lambda configuration about Co(III), based on CD and ORD spectra, The H-1 NMR signals of alpha-L-sorbopyranose and its mixed ...
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(ELSEVIER SCIENCE BV, 1995-03-01)D-Fructose and 1,10-phenanthroline form complexes with Co(III). Configurations about Co(III) are assigned from the CD and ORD spectra of the separated Lambda and Delta diastereomers, and Lambda strongly predominates in the ...
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(ELSEVIER SCIENCE BV, 1993-02-01)D-Glucosamine and ammonia, 1,2-ethylenediamine, or 1,10-phenanthroline form complexes with Co(III)*. The complexes are: [Co(NH3)3-H2O-D-glucosamine]3+, [Co(en)2.D-glucosamine]2+ and [Co(phen)2.D-glucosamine]3+. Formation ...
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(Elsevier Ltd, 1996)The preparation and spectroscopic properties of mononuclear cationic complexes of rhodium(I) coordinated to the diolefin 2,5-norbornadiene (NBD) and to the heterocyclic nitrogen ligands 6,7-dihydrodipyrido-[2,3-b:3′,2′-j ...
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(2003)En este trabajo se realiza una evaluación estadística para conocer cómo influye la concentración del ionóforo y el disolvente mediador (DM) en la pendiente (S) y el Límite Práctico de Detección (LPD) de siete electrodos ...
