Results 251 to 260 of about 24,900 (287)
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CBS-QB3 calculation of quantum chemical molecular descriptors of isomeric thiadiazoles
Journal of Molecular Graphics and Modelling, 2006The results of the calculation of several molecular descriptors of isomeric thiadiazoles through the CBS-QB3 model chemistry are presented in this work. The results could be useful in quantitative structure-activity relationship (QSAR) or quantitative structure-property relationship (QSPR) studies of derivatives of the nitrogen-containing analogs of ...
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Molecular Informatics, 2019
AbstractLinear quantitative structure‐property relationships (QSPRs) for the prediction of diffusion coefficients (log Dp) were developed for organic contaminants in two common passive sampler materials, polydimethylsiloxane (PDMS) and low‐density polyethylene (LDPE).
Alina M. Lampic +2 more
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AbstractLinear quantitative structure‐property relationships (QSPRs) for the prediction of diffusion coefficients (log Dp) were developed for organic contaminants in two common passive sampler materials, polydimethylsiloxane (PDMS) and low‐density polyethylene (LDPE).
Alina M. Lampic +2 more
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Journal of Computational Chemistry, 2007
AbstractThe usefulness of a novel type of electronic descriptors called quantum topological molecular similarity (QTMS) indices for describing the quantitative effects of molecular electronic environments on the O‐methylation kinetic of substituted phenols has been investigated. QTMS theory produces for each molecule a matrix of descriptors, containing
Bahram, Hemmateenejad, Afshan, Mohajeri
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AbstractThe usefulness of a novel type of electronic descriptors called quantum topological molecular similarity (QTMS) indices for describing the quantitative effects of molecular electronic environments on the O‐methylation kinetic of substituted phenols has been investigated. QTMS theory produces for each molecule a matrix of descriptors, containing
Bahram, Hemmateenejad, Afshan, Mohajeri
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Chemical Biology & Drug Design, 2007
Three‐way analyses of quantum topological molecular similarity descriptors were used for quantitative structure property relationship modeling of the acidity constant of some phenol derivatives. A three‐way data was built for different molecules by constructing a data matrix for each molecule.
Mahnaz, Esteki +3 more
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Three‐way analyses of quantum topological molecular similarity descriptors were used for quantitative structure property relationship modeling of the acidity constant of some phenol derivatives. A three‐way data was built for different molecules by constructing a data matrix for each molecule.
Mahnaz, Esteki +3 more
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Physical Chemistry Chemical Physics, 2009
Abraham's H-bonding parameters alpha and beta have been described in terms of a minimal set of readily obtainable molecular descriptors. These parameters are basically equilibrium constants for complexation of acids with a reference base (alpha) or bases with a reference acid (beta) measured in a non-hydrogen bonding solvent such as tetrachloromethane.
Devereux, Mike +2 more
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Abraham's H-bonding parameters alpha and beta have been described in terms of a minimal set of readily obtainable molecular descriptors. These parameters are basically equilibrium constants for complexation of acids with a reference base (alpha) or bases with a reference acid (beta) measured in a non-hydrogen bonding solvent such as tetrachloromethane.
Devereux, Mike +2 more
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Journal of Chemical Information and Modeling, 2007
This paper presents a new protocol based on 3D molecular descriptors using QM calculations for use in CoMFA-like 3D-QSSR. The new method was developed and then applied to predict catalytic selectivity in the asymmetric alkylation of aldehydes catalyzed by Zn-aminoalcohols.
Manuel, Urbano-Cuadrado +3 more
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This paper presents a new protocol based on 3D molecular descriptors using QM calculations for use in CoMFA-like 3D-QSSR. The new method was developed and then applied to predict catalytic selectivity in the asymmetric alkylation of aldehydes catalyzed by Zn-aminoalcohols.
Manuel, Urbano-Cuadrado +3 more
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Journal of Mathematical Chemistry, 2006
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The Journal of Organic Chemistry, 2003
The current availability of cheap computer power enables the construction of QSARs from modern ab initio quantum chemical data. Multivariate models for three classes of compounds are developed by means of the quantum topological molecular similarity (QTMS) tool, which incorporates descriptors originating from the "Atoms in Molecules" (AIM) theory ...
Chaudry, U. A., Popelier, P. L A
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The current availability of cheap computer power enables the construction of QSARs from modern ab initio quantum chemical data. Multivariate models for three classes of compounds are developed by means of the quantum topological molecular similarity (QTMS) tool, which incorporates descriptors originating from the "Atoms in Molecules" (AIM) theory ...
Chaudry, U. A., Popelier, P. L A
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International Journal of Quantum Chemistry, 2009
AbstractIn this article, we assess the ability of common molecular descriptors issued from quantum chemistry calculations (geometrical parameters, atomic charges, isodesmic energies, polarizabilities, and descriptors from conceptual DFT) to predict the butene selectivity in the mixed (P,N)‐nickel(II) catalyzed ethylene dimerization process. To this aim,
Tognetti, Vincent +2 more
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AbstractIn this article, we assess the ability of common molecular descriptors issued from quantum chemistry calculations (geometrical parameters, atomic charges, isodesmic energies, polarizabilities, and descriptors from conceptual DFT) to predict the butene selectivity in the mixed (P,N)‐nickel(II) catalyzed ethylene dimerization process. To this aim,
Tognetti, Vincent +2 more
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Journal of Molecular Structure, 2018
Abstract Omega-6 fatty acids are essential polyunsaturated fatty acids (PUFAs) and found in refined vegetable oils, nuts and seed that play a very important role in heart and brain function, along with normal growth and development. These acids have at least two double bonds and 18 carbon atoms (18:2) that the number of double bonds present refers to
Tuğba Gocen, M. H. Güven, Sevgi Bayari
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Abstract Omega-6 fatty acids are essential polyunsaturated fatty acids (PUFAs) and found in refined vegetable oils, nuts and seed that play a very important role in heart and brain function, along with normal growth and development. These acids have at least two double bonds and 18 carbon atoms (18:2) that the number of double bonds present refers to
Tuğba Gocen, M. H. Güven, Sevgi Bayari
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