For the methylation reaction, the electrophilic attack of the methyl group was affected by the introduction of more electron-withdrawing nitro group.doi:10.1016/j.cplett.2021.138834Fangjian ShangJianyong LiuPanwang ZhouChaoyang ZhangChemical Physics Letters...
The influence of the electron-withdrawing substituent on the pyrimidine core as well as the nature of the amino electron donating group has been studied by cyclic voltammetry, UV/Vis and emission spectroscopy. Whereas 2-(4-cyanophenyl)quinazoline and 2-(4-trifluorophenyl)quinazoline derivatives are...
Theoretical studies of the effect of electron-withdrawing dicyanovinyl group on the electronic and charge-transport properties of fluorene-thiophene oligomers The Molecular structure, conformational stability and vibrational frequencies of succinonitrile NCCH 2CH 2CN have been investigated with ab initio and ...
Calculations also suggest that an additional improvement of the nonlinearity should be expected upon functionalization of the N1 atom of the 6-nitrobenzimidazole with electron-withdrawing groups. Experimental nonlinearities (EFISH technique, μβ/10−48 esu, λ = 1.907 μm, DMF solution) between ...
A novel synthetic approach to a series of bulky triarylamines substituted by various electron-withdrawing groups and forming amorphous materials is present... Eléna,Ishow,Cyril,... - 《Journal of the American Chemical Society》 被引量: 81发表: 2003年 Non-centrosymmetric crystals of newN-benzylid...
H HH On the other hand, in p-nitrobenzaldehyde, the NO2 gp is a powerfuil electron- withdrawing gp. It withdraws electrons both by inductive and resonance effect thereby decreasing the electron density on the carbon atom of carboxyl gp. This facilitates the attack of the nucleophile and ...
The second-order optical nonlinearities and transparencies of eight substituted styrenes containing at least one sulfonyl group at the β-position, as the electron-withdrawing group, were examined. Oxidation at a sulfur atom (SMe → SOMe → SO2Me) brings about increases in the β and λmax valu...
To determine the order of basic strength for the given compounds when R = Me (methyl), we need to analyze the basicity of each compound based on the structure and the presence of electron-donating or electron-withdrawing groups.1. Ident
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Study on novel second-order NLO azo-based chromophore containingstrong electron-withdrawing groups and different conjugated bridges. Qiu L,Shen Y Q,Hao J M,Zhai J F,et al. Journal of Materials Science . 2004Qiu L,Shen Y Q,Hao J M,Zhai J F,et al.Study on novel second-order NLO azo-...