Results 31 to 40 of about 12,998 (208)

The substituent effects on the 13c chemical shifts of the azomethine carbon atom of n-(phenyl substituted) salycilaldimines [PDF]

Journal of the Serbian Chemical Society, 2012
The Hammett correlations between 13C-NMR chemical shifts of the azomethine carbon atom and the corresponding substituent constants for thirtheen Schiff bases were established.
Drmanić Saša Ž., Marinković Aleksandar D., Nikolić Jasmina B., Jovanović Bratislav Ž.   +3 more
doaj   +1 more source

Scope and Mechanistic Study of the Coupling Reaction of α,β-Unsaturated Carbonyl Compounds with Alkenes: Uncovering Electronic Effects on Alkene Insertion vs Oxidative Coupling Pathways [PDF]

, 2012
The cationic ruthenium-hydride complex [(C6H6)(PCy3)(CO)RuH]+BF4– (1) was found to be a highly effective catalyst for the intermolecular conjugate addition of simple alkenes to α,β-unsaturated carbonyl compounds to give (Z)-selective tetrasubstituted ...
Ackermann L., Ackermann L., Ackermann L., Ackermann L., Anastas P. T., Anastas P. T., Anslyn E. V., Arai T., Beccalli E. M., Berlin J. M., Bernasconi C. F., Chae S. Yi, Colby D. A., Colby D. A., Cristau H.-J., Do W. Lee, Donohoe T. J., Engle K. M., Flynn A. B., Foley N. A., Frantz D. E., Gansäuer A., Gao H., Giri R., Giri R., Guo L.-N., Hartwig J. F., Ho C.-Y., Hojo D., Huang C., Isaacs N. S., Itami K., Jun C.-H., Kakiuchi F., Kakiuchi F., Kakiuchi F., Ki-Hyeok Kwon, Kwon K.-H., Kwon K.-H., Lee D. W., Lee D.-H., Lemay A. B., Liu L., Lu Y., Maryanoff B. E., Matsubara R., Matsuura Y., McKinley N. F., Negishi E., Ni Y., Ogoshi S., Oh H. K., Park S. H., Patureau F. W., Patureau F. W., Patureau F. W., Pintori D. G., Rakshit S., Rakshit S., Sato T., Sheldon R. A., Shen Y., Shi B.-F., Singleton D. A., Stenne B., Strohfeldt K., Stuart D. R., Stuart D. R., Stuart D. R., Su Y., Tang J.-M., Trost B. M., Tsai A. S., Ueyama T., Umeda N., Vorfalt T., Wang F., Wasa M., Wasa M., Weissman H., Weston M. H., Ye M., Yi C. S., Yi C. S., Yokota T., Yu M., Zhang Y.-H., Zhao C., Zhou C., Zhou C., Zhu C.   +90 more
core   +2 more sources

Iodine-catalyzed Transformation of Aryl-substituted Alcohols under Solvent-free and highly concentrated Reaction Conditions

Acta Chimica Slovenica, 2017
Iodine-catalyzed transformations of alcohols under solvent-free reaction conditions (SFRC) and under highly concentrated reaction conditions (HCRC) in the presence of various solvents were studied in order to gain insight into the behavior of the ...
Marjan Jereb, Dejan Vražič
doaj   +1 more source

Collisionless energy transfer in kinetic turbulence: field-particle correlations in Fourier space [PDF]

, 2019
Turbulence is ubiquitously observed in nearly collisionless heliospheric plasmas, including the solar wind and corona and the Earth's magnetosphere.
Howes, Gregory G., Klein, Kristopher G., Li, Tak Chu, Liu, Yi-Hsin, TenBarge, Jason M.   +4 more
core   +2 more sources

Kinetics and Mechanism of Hydrolysis of Benzimidazolylcarbamates [PDF]

, 2007
Synthesis of new 2-aminobenzimidazole-1-carbamates was accomplished by carbamoylation of 2-aminobenzimidazole using different substituted phenyl chloroformates. The aqueous hydrolysis of the new compounds was examined in the pH range 1-13 at 25 oC.
Corte Real, M., Iley, J., Norberto, F.P., Santos, S.P., Silva, D.B.   +4 more
core   +2 more sources

Assessing the nucleophilic character of 2-amino-4-arylthiazoles through coupling with 4,6-dinitrobenzofuroxan: Experimental and theoretical approaches based on structure-reactivity relationships

Journal of Saudi Chemical Society, 2020
A kinetic study of the reactions of potentially bioactive 2-amino-4-arylthiazoles with highly reactive 4,6-dinitrobenzofuroxan (DNBF) is reported herein in acetonitrile solution. The complexation reaction was followed by recording the UV–vis spectra with
Reem A. Alenzi, Nizar El Guesmi, Mohamed R. Shaaban, Basim H. Asghar, Thoraya A. Farghaly   +4 more
doaj   +1 more source

Mechanistic studies of the solvolysis of alkanesulfonyl and arenesulfonyl halides

Beilstein Journal of Organic Chemistry, 2022
There have been several studies on the solvolysis mechanisms for alkanesulfonyl chlorides (RSO2Cl) and arenesulfonyl chlorides (ArSO2Cl). The earlier of these studies were reviewed a little over thirty years ago by Gordon, Maskill and Ruasse (Chem.
Malcolm J. D’Souza, Dennis N. Kevill
doaj   +1 more source

On the Interpretation of Magnetic Helicity Signatures in the Dissipation Range of Solar Wind Turbulence [PDF]

, 2009
Measurements of small-scale turbulent fluctuations in the solar wind find a non-zero right-handed magnetic helicity. This has been interpreted as evidence for ion cyclotron damping.
Chandran, Cho, Howes, Leamon, Podesta, Schekochihin, Smith, Stix   +7 more
core   +1 more source

Estratégias para estudo das correlações de energia livre em acoplamento aril-aril de Suzuki: elucidando ciclos catalíticos através da equação de Hammett

Química Nova, 2012
The present work deals with the study of the correlation of free-energy developed in a catalytic system for Suzuki coupling, by way of the Hammett equation.
Gilber Ricardo Rosa
doaj   +1 more source

Accessing New Phenanthroline-Oxazine Scaffolds as Copper-Dependent DNA Damaging Probes. [PDF]

Chembiochem
New phenanthroline–oxazine ligands derived from natural amino acids are synthesized through an optimized, predictive strategy. When coordinated to copper, these scaffolds display tunable DNA binding, groove selectivity, and oxidative cleavage activity, revealing clear structure activity relationships and expanding the toolbox of copper‐dependent ...
Lynn R, Gibney A, Delahunt E, MacDonald-Brown S, Lence C, Kenny M, Allen M, Khaybullin R, Lukac I, Jordan A, Kellett A.   +10 more
europepmc   +2 more sources