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Showing 1 to 16 of 16 for “"Tautomerism"”.
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Two-dimensional infrared spectroscopy of nucleic acids : application to tautomerism and DNA aptamer unfolding dynamics
… This method was then applied to study the tautomerism of a deoxycytidine analog, KP1212, which is an anti-HIV drug. Multiple tautomers, including the normally rare enol tautomers, were found under physiological conditions. This observation supports the rare tautomer hypothesis, which states …
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PART I PREPARATION OF NOVEL LACTONES AND THEIR PRECURSORS DERIVED FROM METHYL SALICYLATE PART II NUCLEOPHILIC AROMATIC SUBSTITUTION IN A DINITROSALICYLIC LACTONE WITH RING OPENING AND ELIMINATION VIA MEISENHEIMER INTERMEDIATES
… of compounds designed to exhibit ring-chain tautomerism.</p><p>Part II. Nucleophilic aromatic substitution reactions were carried out on 2-(2-hydroxyethoxy)-3,5-dinitrobenzoic acid, methyl ester and the corresponding seven-membered lactone. Nucleophiles chosen for study included iodide, …
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Synthesis and characterization of dirhodium(II) formamidinyl complexes: preliminary studies as catalyst precursors for the allylic oxidation of cyclohexene
… and NMR spectroscopies showing a prototropic tautomerism for L2 and L3. The acetate precursor complexes Rh2(O2CR)4 where R = CH3 (C1) or CF3 (C2) were synthetized and fully characterized. Reaction of C2 with an excess of formamidine ligand yields the complexes C3, C4, C5 and C6 via a …
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Structural investigation of 1,8-dinitro-4,5-dihydroxyanthraquinone and implications for docking as a small molecule inhibitor into the protease of West Nile virus
… the protease. Upon further investigation, tautomerism and a bent configuration may exist in the small molecule. The structure of the small molecule was investigated for structural significance upon binding the dengue and West Nile protease and to see how it affects virtual screening efforts …
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Study of the Valence Tautomer Complex [Co(sq)(cat)(3-tpp)2] for Applications in Molecular Spintronics
… In the first chapter, the phenomenon of valence tautomerism (VT) occurring in coordination compounds is introduced and described from the perspective of Crystal Field Theory (CFT). Further, the molecular structure and physical properties of the [Co(sq)(cat)(3-tpp)2] molecule are explored. The …
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Probing the reaction coordinate of photoinduced spin-crossover with femtosecond M-edge XANES
… choice of the axial ligand. Ultrafast valence tautomerism in a cobalt dioxolene complex is also studied. The transient M-edge XANES spectra show the involvement of a low-spin Co(II) before ultrafast intersystem crossing. Two relaxation pathways from the vibrationally hot and cold high-spin …
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Spin labile conducting metallopolymers : a new architecture for hybrid multifunctional materials
… (4.05) and (4.07) exhibit thermal valence tautomerism in the solid state and in solution. Self assembly of complex (2.10) into polymeric spheres (6.11) afforded the first spincrossover, polydisperse, micro- to nanoscale material of its kind. . Complexes (2.20), (3.24) and (4.07) also form …
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Expanding Deoxygenative Transformations of Alcohols by Phosphorus Compounds Through Geometric Deformation
… a nontrigonal σ³-P compound, the (σ5-P)→(σ³-P) tautomerism is considerably suppressed upon E–H bond (E = OR, OOCR, and SR) oxidative addition without significant changes in the geometry and electronic structure of the nontrigonal P-compound. Employing the knowledge gained from the aforementioned …
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Transition metal complexes of bis(diphenylphosphino)methane, dithizone and dithiolenes: structural, spectroscopic, electrochemical and computational studies
… attempt to resolve or explain the often debated tautomerism of this molecule in the solid state and in solution. The structure of the parent molecule showed the co-existence of the two tautomeric forms in a single structure, with a 2:1 preference for the symmetrical keto form, compared to the …
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Die metatesepolimerisasie van alkyne
… resorcinol and phloroglucinol undergo keto-enol tautomerism. The same catalyst activity is obtained when the ketone, cyclohexanone is used as a cocatalyst and in the absence of a cocatalyst. It is not possible for the ketonic compound to have any influence on the catalyst activity. A decrease in …