Results 171 to 180 of about 12,878 (240)

Solvation of acetone in protic and aprotic solvents and binary solvent mixtures

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases, 1985
The infrared spectra of dilute solutions of acetone in a range of protic and aprotic solvents have been measured in the C—O stretch region. Band maxima are shown to correlate linearly with 13C n.m.r. shifts for the carbonyl carbon and, after suitable corrections, with solvent acceptor numbers.
Martyn C. R. Symons, Graham Eaton
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Selective Recognition of Alkyl Pyranosides in Protic and Aprotic Solvents

Journal of the American Chemical Society, 2008
The design and synthesis of receptors capable of selective, noncovalent recognition of carbohydrates continues to be a signature challenge in bioorganic chemistry. We report a new generation of tripodal receptors incorporating three pyridine (compound 2) or quinoline (compound 3) rings around a central cyclohexane core for use in molecular recognition ...
Prakash B, Palde, Peter C, Gareiss, Benjamin L, Miller   +2 more
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DPPH assay of vegetable oils and model antioxidants in protic and aprotic solvents

Talanta, 2013
The rate of reaction of phenolic antioxidants with DPPH depends on solvent composition. The rate constants can differ by more than two orders of magnitude for the same phenolic compound. Reactions are faster in alcohols than in ethyl acetate that is used routinely for the analysis of antioxidant potential (AOP) of nonpolar samples such as vegetable ...
Tjaša, Prevc, Nataša, Segatin, Nataša Poklar, Ulrih, Blaž, Cigić   +3 more
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One-Electron Reduction Potential for Oxygen- and Sulfur-Centered Organic Radicals in Protic and Aprotic Solvents

Journal of the American Chemical Society, 2005
We estimated one-electron reduction potentials of redox-active organic molecules for a spectrum of eight different functional groups (phenoxyl, p-benzoquinone, phenylthiyl, p-benzodithiyl, carboxyl, benzoyloxyl, carbthiyl, and benzoylthiyl) in protic (water) and aprotic (acetonitrile, N,N-dimethylacetamide) solvents.
Marcel, Schmidt Am Busch, Ernst-Walter, Knapp   +1 more
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Conformational energies of microsolvated Na+ clusters with protic and aprotic solvents from GFNn‐xTB methods

Journal of Computational Chemistry, 2022
Performance of contemporary tight‐binding semiempirical GFNn‐xTB methods for the conformational energies of singly charged sodium clusters Na+(S)n (n = 4–8) with 3 protic and 8 aprotic solvents is examined against the reference RI‐MP2/CBS method.
A. A. Otlyotov, Y. Minenkov
semanticscholar   +1 more source

Rates of Bimolecular Substitution Reactions in Protic and Dipolar Aprotic Solvents

1967
Publisher Summary Bimolecular reactions between anions and polar molecules are very much faster in dipolar aprotic solvents than in protic solvents. This simple observation has led to a reassessment of the chemistry of those rate and equilibrium processes that involve anions in solution. Comparison of rates of S N 2 reactions in protic and in dipolar
A. Parker
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Erratum: Proton solvation in protic and aprotic solvents [J. Comput. Chem. 2015, 37, 1082–1091]

Journal of Computational Chemistry, 2016
Emanuele, Rossini, Ernst-Walter, Knapp
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Phosphoryl transfer from phosphomonoesters in aprotic and protic solvents

Pure and Applied Chemistry, 1980
Abstract
F. Ramirez, J. F. Marecek
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Rotational diffusion in aprotic and protic solvents

Chemical Physics, 1978
Abstract We present the orientational relaxation times in protic and aprotic solvents for rose bengal in its lowest excited singlet state. The method uses a mode locked dye laser for polarized excitation, and time correlated single photon counting for determination of the time resolved polarized fluorescence.
Kenneth G. Spears, Laurence E. Cramer
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Photochemistry of 5-aminoquinoline in protic and aprotic solvents

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2011
Photophysical properties of 5-aminoquinoline (5AQ) have been investigated in various non-polar and polar (protic and aprotic) solvents using steady state and time resolved fluorescence. In aprotic solvents, the spectral maxima depend on the polarity. However, in protic solvents both the fluorescence intensity as well decay time show decrease depending ...
Jagat P, Bridhkoti, Hirdyesh, Mishra, H C, Joshi, Sanjay, Pant   +3 more
openaire   +2 more sources