Results 11 to 20 of about 124,244 (129)

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

Nitriles with High Gas-Phase Basicity—Part II Transmission of the Push–Pull Effect through Methylenecyclopropene and Cyclopropenimine Scaffolds Intercalated between Different Electron Donor(s) and the Cyano N-Protonation Site

Molecules, 2022
This work extends our earlier quantum chemical studies on the gas-phase basicity of very strong N-bases to two series of nitriles containing the methylenecyclopropene and cyclopropenimine scaffolds with dissymmetrical substitution by one or two electron ...
Ewa D. Raczyńska, Jean-François Gal, Pierre-Charles Maria, Ghulam Sakhi Sakhawat, Mohammad Qasem Fahim, Hamid Saeidian   +5 more
doaj   +1 more source

A study of substituent effects on the NH bond in alkyl and aryl 4,6-disubstituted-3-cyano-2-pyridones [PDF]

Journal of the Serbian Chemical Society, 2007
Substituent effects on the IR stretching frequencies and 1H-NMR chemical shifts of the pyridone NH group in 4- and 6-disubstituted alkyl and aryl 3-cyano- 2-pyridones were investigated.
Mišić-Vuković Milica, Jovanović Slobodanka, Mijin Dušan, Csanadi Janos, Đoković Dejan   +4 more
doaj   +3 more sources

Fine tuning Exo2, a small molecule inhibitor of secretion and retrograde trafficking pathways in mammalian cells [PDF]

, 2010
The small molecule 4-hydroxy-3-methoxybenzaldehyde (5,6,7,8-tetrahydro[1]benzothieno[2,3- d]pyrimidin-4-yl)hydrazone (Exo2) stimulates morphological changes at the mammalian Golgi and trans-Golgi network that are virtually indistinguishable from those ...
Barr, Bock, David J. Stephens, Derby, Doherty, Erickson, Falnes, Feng, Feng, Fiebiger, Frédéric Boal, Fuchs, Gewald, Girod, Guetzoyan, Guy J. Clarkson, Helms, Herold, Hey, Hill, J. Michael Lord, Jackson, Johannes, Johannes, Johannes, Klausner, Lieu, Linstedt, Lu, Lucie J. Guetzoyan, Lynne M. Roberts, Macia, McKenzie, Monier, Nambiar, Nieland, Pavelka, Pelish, Perez-Victoria, Peyroche, Pirali, Plourde, Ponnambalam, Renault, Robert A. Spooner, Rostovtsev, Saenz, Saenz, Sandvig, Shima, Shin, Shin, Spooner, Spooner, Stechmann, Tai, Tsai, Viaud, Volpicelli-Daley, Wells, White, Wilcke, Yarrow, Yoshino, Zeghouf, Zhang, Zhao, Zolov   +67 more
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The para-substituent effect and pH-dependence of the organometallic Baeyer–Villiger oxidation of rhenium–carbon bonds [PDF]

, 2012
We studied the Baeyer–Villiger (BV) type oxidation of phenylrhenium trioxide (PTO) by H2O2 in the aqueous phase using Quantum Mechanics (density functional theory with the M06 functional) focusing on how the solution pH and the para-substituent affect ...
Bischof, Steven M., Cheng, Mu-Jeng, Goddard, William A., III, Gunnoe, T. Brent, Nielsen, Robert J., Periana, Roy A.   +5 more
core   +1 more source

Iridium-Catalyzed Silylation of Five-Membered Heteroarenes: High Sterically Derived Selectivity from a Pyridyl-Imidazoline Ligand. [PDF]

, 2020
The steric effects of substituents on five-membered rings are less pronounced than those on six-membered rings because of the difference in bond angles. Thus, the regioselectivities of reactions of five-membered heteroarenes that occur with selectivities
Hartwig, John F, Karmel, Caleb, Kharitonova, Elena V, Rubel, Camille Z   +3 more
core   +1 more source

Solvatochromism of 5-(4-substituted arylazo)-4-phenyl-6-methyl-3-cyano-2-pyridones

Zaštita Materijala, 2018
Eight 5-(4-substituted arylazo)-4-phenyl-6-methyl-3-cyano-2-pyridones were synthesized by reaction of benzoylacetone and arendiazonium salt, followed by condensation with cyanoacetamide. Absorption spectra of all azo pyridone dyes were recorded in twelve
Gordana S. Ušćumlić, Bojan Đ. Božić   +1 more
doaj   +1 more source

Changes in the electronic structure and properties of graphene induced by molecular charge-transfer [PDF]

, 2008
Interaction with electron donor and acceptor molecules such as aniline and nitrobenzene brings about marked changes in the Raman spectrum and the electronic structure of graphene, prepared by the exfoliation of graphitic oxide.Comment: 13 pages, 4 ...
Das, Barun, Rao, C. N. R., Rout, Chandra Sekhar, Voggu, Rakesh   +3 more
core   +1 more source

Electrochemistry of potentially bioreductive alkylating quinones : Part 1. Electrochemical properties of relatively simple quinones, as model compounds of mitomycin- and aziridinylquinone-type antitumour agents [PDF]

, 1990
The influence of methyl-, hydroxy and amino substituents on the electrochemical behaviour of simple 1,4-naphtho-and 1,4-benzoquinones, model compounds of many quinoid antitumour agents, in aqueous media was studied. Significant changes in electrochemical
Bos, M., Driebergen, R.J., Hartigh, J. den, Holthuis, J.J.M., Hulshoff, A., Linden, W.E. van der, Oort, W.J. van, Postma Kelder, S.J., Reinhoudt, D.N., Verboom, W.   +9 more
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The effect of the amido substituent on polymer molecular weight in propene homopolymerisation by titanium cyclopentadienyl-amide catalysts [PDF]

, 2000
In the homopolymerisation of propene by the cyclopentadienyl-amide titanium catalyst systems [η5,η1-C5H4(CH2)2NR]TiCl2/MAO and [η5,η1-C5H4(CH2)2NR]Ti(CH2Ph)2/B(C6F5)3 (R = tBu, iPr, Me), the catalyst with the smallest substituent (Me) on the amido moiety
Hessen, Bart,, Sinnema, Piet-Jan,, Teuben, Jan H.,   +2 more
core   +1 more source