Zobrazeno 1 - 10
of 272
pro vyhledávání: '"Robert W. Taft"'
Autor:
Ivar Koppel, Peeter Burk, and Frederick Anvia, Jean-François Gal, José-Luis M. Abboud, P.-C. Maria,§, Riho Kurg, M. Herreros, Ilmar A. Koppel, Rafael Notario, Robert W. Taft
Publikováno v:
The Journal of Physical Chemistry A. 104:2824-2833
The previously reported gas-phase lithium cation basicity (LCB) scale (Taft et al. Pure Appl. Chem. 1990, 62, 17) was revised on the basis of recent experimental and theoretical (G2 calculations) results. A new anchoring based on the experimental LCA
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6371c9b4931843f2acef700dd1ec153
https://doi.org/10.1021/jp9931399
https://doi.org/10.1021/jp9931399
Autor:
Ilmar A. Koppel, Juta Koppel, Viljar Pihl, Ivo Leito, Masaaki Mishima, Vladislav M. Vlasov, Lev M. Yagupolskii, (the late) Robert W. Taft
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :1125-1133
The Bronsted acidities of a number of neutral CH-acids (substituted toluenes, aryl- and diarylacetonitriles, fluorenes, ethyl esters of phenylcyanoacetic acids, substituted methanes, etc.) were measured in the gas phase (pulsed FT-ICR spectrometry) a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e916d6682ec7e15cd013c3b8ba48fbb7
https://doi.org/10.1039/b001792m
https://doi.org/10.1039/b001792m
Autor:
Robert W. Taft, Ilmar A. Koppel, Jean-François Gal, Juta Koppel, Pierre-Charles Maria, Rafael Notario, Vladislav M. Vlasov
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. 175:61-69
The Bronsted acidities of several neutral NH-acids (substituted diphenylamine, substituted anilines and imides) were measured in the gas phase (pulsed FT ICR spectrometry), dimethyl sulfoxide and aqueous solution. Comparison of the Bronsted acidities
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7222e2e7bf5e6e54544dc275ee833aa6
https://doi.org/10.1016/s0168-1176(98)00113-x
https://doi.org/10.1016/s0168-1176(98)00113-x
Autor:
Ewa D. Raczyńska, Robert W. Taft
Publikováno v:
Bulletin of the Chemical Society of Japan. 70:1297-1305
Proton affinities for seven polyfunctional nitrogen bases (N1,N1-dimethyl-N2-azinylformamidines) containing one amidine moiety and one, two or three nitrogen atoms in ortho-, meta-, and/or para-positions of the heterocyclic six-membered group have be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a46ef9b761dc57651bfed89d35538586
https://doi.org/10.1246/bcsj.70.1297
https://doi.org/10.1246/bcsj.70.1297
Publikováno v:
Journal of Physical Organic Chemistry. 9:626-630
The intramolecular hydrogen bonding (chelation) of salicylaldehyde, methyl salicylate, N,N-dimethylsalicylamide and 2-hydroxyacetophenone was studied by IR spectroscopy in different phases used for partition coefficient determinations. The extent of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8bd64593edf228121ec8686f23048c6
https://doi.org/10.1002/(sici)1099-1395(199609)9:9<626::aid-poc828>3.0.co
https://doi.org/10.1002/(sici)1099-1395(199609)9:9<626::aid-poc828>3.0.co
Publikováno v:
Journal of Physical Organic Chemistry. 9:255-261
Measurements were made in CCl4 of the formation constant KHB of the 1:1 hydrogen-bonded complexes between the reference donor 4-fluorophenol and the intramolecular hydrogen-bonded systems I (one lone pair on heteroatom Y, one intramolecular hydrogen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5515bd8dea4fb1cb1b20dad29751a7ba
https://doi.org/10.1002/(sici)1099-1395(199605)9:5<255::aid-poc779>3.0.co
https://doi.org/10.1002/(sici)1099-1395(199605)9:5<255::aid-poc779>3.0.co
Publikováno v:
Journal of Computational Chemistry. 17:30-41
Quantum chemical calculations of potentially superacidic neutral Bronsted acids were carried out using the PM3 method. It was shown that the PM3 method can be used to predict the gas phase acidities of acidic compounds only if empirical corrections a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1b4c2766adc876a4ef44ef5d503fa7e
https://doi.org/10.1002/(sici)1096-987x(19960115)17:1<30::aid-jcc3>3.0.co
https://doi.org/10.1002/(sici)1096-987x(19960115)17:1<30::aid-jcc3>3.0.co
Publikováno v:
Journal de Chimie Physique. 92:22-36
Les affinites protoniques (PAs) d'une serie de N 1 ,N 1 -dimethylformamidines substituees sur l'azote imino (N 2 ), sont calcules en utilisant la methode semi-empirique AM1. Dans la serie etudiee, les substituants sont des alkyles simples et des subs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32d77091ecdf9a59a0aa88a649f9a202
https://doi.org/10.1051/jcp/1995920022
https://doi.org/10.1051/jcp/1995920022
Publikováno v:
Journal of Physical Organic Chemistry. 7:717-724
Fourier transform ion cyclotron resonance (FT-ICR) spectrometry was used to study and recheck the proton transfer equilibria for a large number of low-basicity compounds, particularly those which are less basic than H2O. The data obtained were used f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::116939cc4678294162695e0d11a21a93
https://doi.org/10.1002/poc.610071210
https://doi.org/10.1002/poc.610071210
Publikováno v:
Journal of the American Chemical Society. 116:8654-8657
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::010063b2d3626c4c0443100ef8924ab2
https://doi.org/10.1021/ja00098a027
https://doi.org/10.1021/ja00098a027