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Ferrocenoyl-adenines: substituent effects on regioselective acylation [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2022
A series of N6-substituted adenine–ferrocene conjugates was prepared and the reaction mechanism underlying the synthesis was explored. The SN2-like reaction between ferrocenoyl chloride and adenine anions is a regioselective process in which the product ...
Mateja Toma   +5 more
doaj   +2 more sources

Substituent effects in N-acetylated phenylazopyrazole photoswitches [PDF]

open access: yesBeilstein Journal of Organic Chemistry
Phenylazopyrazole photoswitches proved to be valuable structural motifs for various applications ranging from materials science to medicine. Despite their potential, their structural diversity is still limited and a larger pool of substitution patterns ...
Radek Tovtik   +4 more
doaj   +2 more sources

Substituent Effects in Tetrel Bonds Involving Aromatic Silane Derivatives: An ab initio Study [PDF]

open access: yesMolecules, 2023
In this manuscript substituent effects in several silicon tetrel bonding (TtB) complexes were investigated at the RI-MP2/def2-TZVP level of theory. Particularly, we have analysed how the interaction energy is influenced by the electronic nature of the ...
Sergi Burguera   +2 more
doaj   +2 more sources

Substituent Effects on the Ultraviolet Absorption Properties of 2,4-Dihydroxy Dibenzophenone [PDF]

open access: yesMolecules, 2022
Substituent effects on the ultraviolet absorption properties of 2,4-dihydroxy dibenzophenone were investigated experimentally. Nine compounds of 2,4-dihydroxy dibenzophenone with different substituents were prepared by a solvent-free reaction of benzoyl ...
Feng Wu   +7 more
doaj   +2 more sources

Substituent Effects in the Photophysical and Electrochemical Properties of Meso-Tetraphenylporphyrin Derivatives [PDF]

open access: yesMolecules
Porphyrins were identified some years ago as a promising, easily accessible, and tunable class of organic photoredox catalysts, but a systematic study on the effect of the electronic nature and of the position of the substituents on both the ground-state
Alexandra Cruz Millheim   +2 more
doaj   +2 more sources

13C- and 1H-NMR substituent-induced chemical shifts in N(1)-(4-substituted phenyl)-3-cyano-4,6-dimethyl-2-pyridones [PDF]

open access: yesJournal of the Serbian Chemical Society, 2008
The 13C- and 1H-NMR chemical shifts of thirteen N(1)-(4-substituted phenyl)-3-cyano-4,6-dimethyl-2-pyridones were measured in deuterated dimethyl sulfoxide (DMSO-d6). The correlation analysis for the substituent-induced chemical shifts (SCS) with sigmap,
BRATISLAV Z. JOVANOVIC   +4 more
doaj   +3 more sources

Effect of substituents on the 13C-NMR chemical shifts of 3-methylene-4-substituted-1,4-pentadienes. Part I. [PDF]

open access: yesJournal of the Serbian Chemical Society, 2003
The principles of linear free energy relationships were applied to the 13C substituent chemical shifts (SCS) of the carbon atoms in the unsaturated chain of 3-methylene-4-substituted-1,4-pentadienes.
IVAN O. JURANIC   +5 more
doaj   +3 more sources

Effects of substituents on the electronic absorption spectra of 3-N-(4-substituted phenyl)-5-carboxy uracils in different solvents. Part II. [PDF]

open access: yesJournal of the Serbian Chemical Society, 2000
Absorption spectra of some 3-N-(4-substituted phenyl)-5-carboxy uracils, previously determined in twelve solvents, are correlated with substituent sp+ values or by dual substituent parameter correlations involving sl and sR+ values.
M. RADOJKOVIC-VELICKOVIC   +2 more
doaj   +2 more sources

Singlet/Triplet State Anti/Aromaticity of CyclopentadienylCation: Sensitivity to Substituent Effect

open access: yesChemistry, 2021
It is well known that singlet state aromaticity is quite insensitive to substituent effects, in the case of monosubstitution. In this work, we use density functional theory (DFT) calculations to examine the sensitivity of triplet state aromaticity to ...
Milovan Stojanović   +2 more
doaj   +1 more source

Photolysis of ortho-Nitrobenzyl Esters: Kinetics and Substituent Effects [PDF]

open access: yesACS Omega
Anthony L. Fink   +3 more
doaj   +2 more sources

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