Results 11 to 20 of about 341,897 (260)

Controlling the Redox Catalytic Activity of a Cyclic Selenide Fused to 18-Crown-6 by the Conformational Transition Induced by Coordination to an Alkali Metal Ion

open access: yesMolecules, 2023
trans-3,4-Dihydroxyselenolane (DHS), a water-soluble cyclic selenide, exhibits selenoenzyme-like unique redox activities through reversible oxidation to the corresponding selenoxide.
Michio Iwaoka, Hajime Oba, Takeru Ito
doaj   +1 more source

N-(2,3-Difluorophenyl)-2-fluorobenzamide

open access: yesMolbank, 2023
The title compound N-(2,3-difluorophenyl)-2-fluorobenzamide or (Fo23) was obtained at high yield (88%) from the condensation reaction of 2-fluorobenzoyl chloride with 2,3-difluoroaniline using standard synthetic procedures.
Niall Hehir, John F. Gallagher
doaj   +1 more source

Structural, Conformational and Spectroscopic Investigations of a Biologically Active Compound: L-Dopa

open access: yesApplied Sciences, 2023
Structural, conformational and spectroscopic investigations of the L-dopa molecule were made at the b3lyp/6-311++g** level using the Gaussian 09 software.
Rohit Kumar Yadav   +2 more
doaj   +1 more source

APPLICATIONS OF NMR AND THEORETICAL CALCULATIONS TO STUDY THE O-H∙∙∙N INTRAMOLECULAR HYDROGEN BOND EFFECT ON THE CONFORMATIONAL EQUILIBRIUM OF CIS-3-N-ETHYLAMINOCYCLOHEXANOL AND CIS-3-N,N-DIETHYLAMINOCYCLOHEXANOL [PDF]

open access: yesQuímica Nova, 2023
Textbooks show that in cis-1,3-disubstituted cyclohexane molecule, the conformer with the substituents in the diaxial positions is higher in energy and hence, it presents a low population in the conformational equilibrium.
Paulo R. de Oliveira   +4 more
doaj   +1 more source

Conformational Itinerary of Sucrose During Hydrolysis by Retaining Amylosucrase

open access: yesFrontiers in Chemistry, 2019
By means of QM(DFT)/MM metadynamics we have unraveled the hydrolytic reaction mechanism of Neisseria polysaccharea amylosucrase (NpAS), a member of GH13 family.
Santiago Alonso-Gil   +4 more
doaj   +1 more source

Chiral Recognition of Flexible Melatonin Receptor Ligands Induced by Conformational Equilibria

open access: yesMolecules, 2020
N-anilinoethylamides are a class of melatoninergic agents with the aniline portion mimicking the indole ring of the natural ligand and the ethylamide chain reproducing that of melatonin.
Gian Marco Elisi   +9 more
doaj   +1 more source

Mechanism of Reactions of 1-Substituted Silatranes and Germatranes, 2,2-Disubstituted Silocanes and Germocanes, 1,1,1-Trisubstituted Hyposilatranes and Hypogermatranes with Alcohols (Methanol, Ethanol): DFT Study

open access: yesMolecules, 2020
The mechanism of reactions of silatranes and germatranes, and their bicyclic and monocyclic analogues with one molecule of methanol or ethanol, was studied at the Density Functional Theory (DFT) B3PW91/6-311++G(df,p) level of theory.
Denis Chachkov   +2 more
doaj   +1 more source

Computational and Spectral Investigation of 5,12-Dihydro-5,12-ethanonaphthacene-13-carbaldehyde

open access: yesMolecules, 2011
A conformational search of 5,12-dihydro-5,12-ethanonaphthacene-13-carbaldehyde predicted the presence of twelve conformations. The geometry of the twelve conformations established at the B3LYP/6-31G* level showed only six unique ones.
Abdulrahman I. Almansour   +5 more
doaj   +1 more source

A Vibrational Spectroscopic Investigation of 2,2'-Bithiophene Using Experimental and DFT Methods

open access: yesSakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2023
Organic compounds like 2,2’-Bithiophene (with a synonym. 2,2'-bithienyl, 2,2'-dithienyl)-containing bis(dioxaborin) have drawn significant concern in the area of materials science because of their electron affinity and luminescent properties.
Feride Pınar Özturan   +3 more
doaj   +1 more source

Synthesis and Ab Initio Study of Pyrano[2,3-d]pyrimidine Derivatives [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2014
Tetrahydrobenzo[b]pyran derivatives 1 were utilized for the synthesis of several new pyrano[2,3-d]pyrimidine derivatives 2. Compound 2 was obtained in the presence of Ac2O/H2SO4 (as a catalyst) and was confirmed by spectroscopic data such as IR, 1H NMR ...
Masoumeh Shahi   +2 more
doaj  

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