Results 221 to 230 of about 26,347 (256)
Some of the next articles are maybe not open access.
Protonation Equilibrium of 4-Substituted Benzohydroxamic Acids in Mineral Acids
The Journal of Organic Chemistry, 1999The protonation equilibria of some 4-substituted benzohydroxamic acids 4-X(C(6)H(4)CONHOH) (X = H, OMe, Cl) have been investigated in aqueous sulfuric, perchloric, and hydrochloric acids at 25 degrees C UV spectrophotometrically. The Hammett acidity function method, the Bunnett-Olsen method, Cox-Yates excess acidity function method, and Marziano-Cimino-
Kallol K., Ghosh +2 more
openaire +2 more sources
J. Chem. Soc. B, 1969
Configurational equilibria for a range of N-alkylpiperidine hydrochlorides in deuterium oxide or deuteriochloroform have been examined by n.m.r. spectroscopy. Where comparison with equilibria in analogous cyclohexane systems is possible, higher proportions of the less stable configurations are observed in the hydrochloride solutions.
J. McKenna, J. M. McKenna
openaire +1 more source
Configurational equilibria for a range of N-alkylpiperidine hydrochlorides in deuterium oxide or deuteriochloroform have been examined by n.m.r. spectroscopy. Where comparison with equilibria in analogous cyclohexane systems is possible, higher proportions of the less stable configurations are observed in the hydrochloride solutions.
J. McKenna, J. M. McKenna
openaire +1 more source
Metal-proton equilibrium relations in a chelating iminodiacetic resin
Industrial & Engineering Chemistry Research, 1992A model of equilibrium including the pH effect was proposed and tested with experimental data of the Na-H-metal systems onto chelating resins. The protonation constants were used to calculate the complexing capacity of the metals Cu, Ni, Co, and Zn in the iminodiacetic type resin.
Federico Mijangos, Mario Diaz
openaire +1 more source
Equilibrium structures, proton affinities, and ionization potentials of the fluoroacetones
Canadian Journal of Chemistry, 1985Theoretical calculations on the fluoroacetones and their conjugate acids exhibit an inverse dependence of the proton affinity on the number of fluorine substituents. The good correlation between increasing proton affinity and decreasing ionization potential is attributed to the observation that the ionization of a nonbonding electron is essentially ...
Sai Cheng Choi, Russell J. Boyd
openaire +1 more source
Effect of the protonation equilibrium on the interaction of mixed micelles with their counterions
Colloid & Polymer Science, 1999Ionic/nonionic mixed micelle formation of dodecyldimethylamine oxide (DDAO) was studied by measuring the activities of DDAO+ ions and Cl− ions using surfactant-selective electrodes and Ag/AgCl electrodes at three pH values in the absence of added salt.
H. Katsuura +3 more
openaire +1 more source
Protonation Effects on the Equilibrium and Dynamical Properties of the Alanine Tetrapeptide
The Journal of Physical Chemistry B, 1997The effect of terminal group charge on the structure and dynamics of the alanine tetrapeptide has been investigated using molecular dynamics simulations.
Herb D. Blatt +2 more
openaire +1 more source
Non-Equilibrium Proton Gradients for Photoenergy Conversion
ACS Applied Energy MaterialsBiological systems use proton gradients to convert light into chemical potential with remarkable efficiency, offering a blueprint for synthetic approaches to light-to-ionic energy conversion. Inspired by this principle, light-responsive molecular switches have emerged as key building blocks for artificial systems that generate and sustain proton ...
Xinchen Dai +7 more
openaire +1 more source
Electrochemical reactions with protonations at equilibrium
Journal of Electroanalytical Chemistry, 1992R. Meunier-Prest, E. Laviron
openaire +1 more source
Equilibrium structure of equatorially mirroring radiation belt protons
Journal of Geophysical Research, 1977The average quiet time structure of energetic radiation belt protons can be explained as an equilibrium balance among radial diffusive transport from a proton source located just within the first closed field lines, losses due to Coulomb collisions, and charge exchange with the ambient neutral hydrogen geocorona.
openaire +1 more source
Electrochemical reactions with protonations at equilibrium
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1983E. Laviron, L. Roullier
openaire +1 more source