Results 21 to 30 of about 9,273,531 (285)

Structure-acidity-IR spectra correlations for p-substituted N-phenylsulfonylbenzamides [PDF]

open access: yes, 2004
The wavenumbers of the IR absorption bands of the C=O, S=O and N-H stretching vibrations for a series of p-substituted N-phenylsulfonylbenzamides were measured in trichloromethane.
Pařík, Patrik   +5 more
core   +2 more sources

Rate and equilibrium constants for the addition of N-heterocyclic carbenes into benzaldehydes : a remarkable 2-substituent effect [PDF]

open access: yes, 2015
We thank the Royal Society for a University Research Fellowship (ADS), the EPSRC (CJC and RM) grant number EP/G013268/1 and the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013) ERC grant agreement no 279850
Collett, Christopher John   +17 more
core   +1 more source

Substituent effects on non-covalent interactions [PDF]

open access: yes, 2020
Non-covalent interactions play a vital role in biological and chemical systems, underpinning important processes such as ligand–receptor binding and protein structure.
Burns, Rebecca Jayne
core   +1 more source

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

open access: yesZaštita 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   +1 more
doaj   +1 more source

Substituent effects on nonadiabatic excited state dynamics: Inertial, steric, and electronic effects in methylated butadienes

open access: yes, 2020
The photochemical dynamics of double-bond-containing hydrocarbons is exemplified by the smallest alkenes, ethylene and butadiene. Chemical substituents can alter both decay timescales and photoproducts through a combination of inertial effects due to ...
Andrey E. Boguslavskiy   +11 more
core   +1 more source

Substituent-Induced Hyperconjugation: Origin of the Structural Effects on the Efficiency of Photochemical Ring Opening

open access: yes, 2023
Photochemical ring-opening reactions are among the most extensively employed chemical reactions in the field of chemistry. Owing to their significance, molecular-level studies of these reactions have been widely conducted. One of the major considerations
Seongmin Im (17309357)   +1 more
core   +1 more source

Substituent effect on IR, 1H and 13C NMR spectral data in n-(substituted phenyl)-2-cyanoacetamides: A correlation study [PDF]

open access: yesChemical Industry and Chemical Engineering Quarterly, 2013
Linear free energy relationships (LFER) were applied to the IR, 1H and 13C NMR spectral data of N-(substituted phenyl)-2-cyanoacetamides. A variety of substituents were employed for phenyl substitution and fairly good correlations were obtained using ...
Marinković Aleksandar D.   +5 more
doaj   +1 more source

Computational analysis of substituent effect on emission wavelengths and chemical reaction rates [PDF]

open access: yes, 2021
Substituent groups are widely used to take advantage of their electronic and steric proper- ties. For example, substituents with an electron-donating or electron-withdrawing nature have been utilized to design new materials with effective photophysical ...
Satalkar, Vardhan
core  

Substituent and Solvent Effect Studies of N-Alkenylnitrone 4π-Electrocyclizations [PDF]

open access: yes, 2022
The roles of substituent and solvent effects in promoting the 4π-electrocyclization of N-alkenylnitrones to give azetidine nitrones have been investigated by experimental examination of relative rates, activation energies, and linear free energy ...
Laura, Alonso   +5 more
core   +2 more sources

Substituent effects in iron porphyrin catalysts for the hydrogen evolution reaction [PDF]

open access: yes, 2022
For a future hydrogen economy, non precious metal catalysts for the water splitting reactions are needed that can be implemented on a global scale. MNC catalysts with MN4 active sites show promising performance, but an optimization rooted in structure ...
Niklas, von Rhein   +10 more
core   +2 more sources

Home - About - Disclaimer - Privacy