Effect of benzene derivatives bearing electron-releasing and/or electron-withdrawing groups on the fluorescence of CdS-Q clusters. C A Suchetti,R H Lema,M Hamity. The Journal of Photochemistry . 2005Suchetti C.A., Lema R.H., Hamity M.: Effect of benzene derivatives bearing electron-...
bearing either an electron-withdrawing or an electron-releasing end group on a triphenylbenzene core which can act as a (weak) donor or acceptor ... J Brunel,A Jutand,IN Ledoux,... - International Symposium on Optical Science & Technology 被引量: 33发表: 2002年 Chemiluminescent 1,2-dioxet...
releases electrons into a reaction center and as such stabilizes electron deficient s.Examples of electron releasing groups are The total substituent effect is the combination of the polar effect and the combined steric effects.In and substituents are divided into s and deactivating groups where the ...
For example, if there are electron-withdrawing groups attached to the O- or COO- group, they can withdraw electrons through resonance, making them electron-withdrawing groups in the π system. How do O- and COO- compare to other electron releasing groups in a π system?
Reactions of compound 6 with anilines of type 7 containing electron-releasing groups (ERG) have previously been described in: (a) Kaberdin, R. V.; Potkin, V. I.; Zapol’skii, V. A.; Russ. Chem. Rev.1997, 66, 827, and (b) Ol’dekop, Y. A.; Kaberdin, R. V.; Potkin, ...
For example, all the electron-releasing (for example, 4-Me, 2-Me and 4-MeO) and electron-withdrawing (for example, 4-F, 4-Cl, 4-Br, 2,4-2Cl) groups were well tolerated under the standard conditions, furnishing the expected products 6a-6g in 51–81% yield. Interestingly, during ...
This transfer results in π-electron reorganization of the X–C(1)–C(2)–OH fragment, and thereby increases the electron-releasing character of the OH group and the electron-withdrawing power of acceptor X groups, but the remaining atoms of the ring are little affected. With such an ...
releases electrons into a reaction center and as such stabilizes electron deficient s.Examples of electron releasing groups are The total substituent effect is the combination of the polar effect and the combined steric effects.In and substituents are divided into s and deactivating groups where the ...
The modulation of bandgap and HOCO/LUCO energies of conjugated polymers by copolymerization or by incorporation of electron withdrawing/releasing groups is studied. The study was conducted by band structure calculation applying density functional theory with generalized gradient approximation. The polymers ...
(typically Pt or Pd) behave as efficient σ-acceptors and activate organonitriles39 (see Chapter 1.34) or isocyanides40 toward nucleophilic attack, whereas those of earlier groups (namely Mo, W, or Re, in low oxidation states) exhibit a strong π-electron releasing character and can activate...