Results 41 to 50 of about 124,244 (129)

Hammett Correlations in the \u3csup\u3e1\u3c/sup\u3eH NMR Spectra of Some N-Arlydihalonicotinamides [PDF]

, 1992
Excellent linear correlations of amide proton chemical shifts (Snh) (in DMSO-d6 ) with Hammett substituent constants (5) for a series of 4-substituted anilides of four dihalonicotinic acid systems were observed. Dihalonicotinanilides with chlorine in the
Caldwell, Jody Z., Rogers, Debra L., Setliff, Frank L., Soman, Nikhil G.   +3 more
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A Theoretical Study of the Relationship between the Electrophilicity ω Index and Hammett Constant σp in [3+2] Cycloaddition Reactions of Aryl Azide/Alkyne Derivatives

Molecules, 2016
The relationship between the electrophilicity ω index and the Hammett constant σp has been studied for the [2+3] cycloaddition reactions of a series of para-substituted phenyl azides towards para-substituted phenyl alkynes. The electrophilicity ω index—a
Hicham Ben El Ayouchia, Hafid Anane, Moulay Lahcen El Idrissi Moubtassim, Luis R. Domingo, Miguel Julve, Salah-Eddine Stiriba   +5 more
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Local structure and site occupancy of Cd and Hg substitutions in CeTIn5 (T=Co, Rh, Ir)

, 2009
The CeTIn5 superconductors (T=Co, Rh, or Ir) have generated great interest due to their relatively Tc's, NFL behavior, and their proximity to AF order and quantum critical points. In contrast to small changes with the T-species, electron doping in CeT(In{
A. A. Abrikosov, A. D. Bianchi, C. Capan, C. H. Booth, E. D. Bauer, F. Ronning, J. D. Thompson, J. Goulon, J. L. Sarrao, Julia Y. Chan, Jung Young Cho, T. M. Hayes, W. A. Harrison, Z. Fisk   +13 more
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A multiswitchable poly(terthiophene) bearing a spiropyran functionality: understanding photo and electrochemical control [PDF]

, 2011
An electroactive nitrospiropyran-substituted polyterthiophene, 2-(3,3′′-dimethylindoline-6′-nitrobenzospiropyranyl)ethyl 4,4′′-didecyloxy-2,2′:5′,2′′-terthiophene-3′-acetate, has been synthesized for the first time.
Breukers, Robert, Byrne, Robert, Dennany, Lynn, Diamond, Dermot, Gambhir, Sanjeev, Higgins, Michael, Officer, David, Wagner, Klaudia, Wagner, Pawel, Wallace, Gordon, Zanoni, Michele   +10 more
core   +1 more source

Effect of substituents on the 1H-NMR chemical shifts of 3-methylene-2-substituted-1,4-pentadienes [PDF]

Journal of the Serbian Chemical Society, 2003
The principle of linear free energy relationships was applied to the 1H chemical shifts of the b-vinyl proton atoms of 3-methylene-2-substituted-1,4-pentadienes.
GORDANA S. USCUMLIC, NATASA V. VALENTIC
doaj  

Chlorine in an Organic Molecule, a Universal Promoter—Workhorse—Of Reactions

Molecules, 2023
Due to the electronic configuration of the atom and charge of the nucleus, the chlorine in organic molecules can exert a variety of effects. It can depart as a chloride anion in the process of substitution and elimination, facilitates the abstraction of ...
Mieczysław Mąkosza, Michał Fedoryński   +1 more
doaj   +1 more source

From Static to Dynamic: Electron Density of HOMO at Biaryl Linkage Controls the Mechanism of Hole Delocalization [PDF]

, 2018
In order to extend the physical length of hole delocalization in a molecular wire, chromophores of increasing size are often desired. However, the effect of size on the efficacy and mechanism of hole delocalization remains elusive.
Ivanov, Maxim V., Rathore, Rajendra, Wang, Denan   +2 more
core   +3 more sources

Synthesis of New BINAP-Based Aminophosphines and Their 31P-NMR Spectroscopy

Molecules, 2013
BINAP aminophosphines are prevalent N,P-bidentate, chiral ligands for asymmetric catalysis. While modification via the BINAP-nitrogen linkage is well explored and has provided a diverse body of derivatives, modification of the other substituents of the ...
Fei Liu, Mark Richardson, Peter Karuso, Christopher Anstiss   +3 more
doaj   +1 more source

Synthesis and Reactivity of Tricarbonyl(1-ethoxy-carbonyl-2-methylpentadienyl)iron(1+) Cation [PDF]

, 2001
The title cation was prepared in two steps from the known (ethyl 3-methyl-6-oxo-2,4-hexadienoate)Fe(CO)3. Reation of the cation with NaBH3CN, methyl cuprate, phthalimide, water, PPh3, or malonate anions gave predominantly the products from nucleophilic ...
Bärmann, Heiko, Donaldson, William, Yun, Young K.   +2 more
core   +1 more source

Expanding the palette of phenanthridinium cations [PDF]

, 2014
5,6-Disubstituted phenanthridinium cations have a range of redox, fluorescence and biological properties. Some properties rely on phenanthridiniums intercalating into DNA, but the use of these cations as exomarkers for the reactive oxygen species (ROS ...
Acevedo, Amann, Amatore, Amii, Augustine, Barluenga, Blanchot, Blanksby, Bolognesi, Bourne, Bourne, Bourne, Chen, Cheng, Chiavarino, Chiavarino, Chéron, Coe, Darzynkiewicz, Deb, Diaba, Dimiza, Döbele, Exner, Fernández, García, Ghaneolhosseini, Giroldo, Glendening, Glendening, Glendening, Glukhovtsev, Goerigk, Goryunov, Hata, Hu, Huang, Huber, Ihmels, Intrieri, Ishihara, Ishii, Jain, Jankowiak, Jones, Jose, Kitson, Korotvicka, Kostiainen, Kubar, Kundu, Lallana, Lee, Leupin, Lewis, Liang, Liljenberg, Liljenberg, Liljenberg, Liu, Liu, Logan, Luedtke, Luedtke, Manetsch, Marivingt-Mounir, Marivingt-Mounir, Mayer, McBurney, Michalski, Michels, Molander, Nakanishi, O′Brien, O′Connor, Parenty, Park, Pliego, Prunkl, Radic, Rangarajan, Richmond, Robinson, Schmidt, Shaw, Sletten, Smith, Sotomayor, Stevens, Stojkovic, Sumerlin, Sun, Suzuki, Takeda, Tanaka, Tanaka, Tobisu, van der Wiel, Veale, Wainwright, Wakelin, Walls, Watkins, Weigend, Weinhold, Weinhold, Wolff, Yamaguchi, Zhang, Zhao, Zhao, Zhidkov, Zhidkov, Zielonka, Zille   +114 more
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