So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Cauletti, Carla; Giancaspro, Carlo; Monaci, Anna; Piancastelli, M. Novella researched the compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate( cas:2199-44-2 ).Category: thiazolidine.They published the article 《Free energy relationships of ionization energies measured by ultraviolet photoelectron spectroscopy in substituted pyrroles》 about this compound( cas:2199-44-2 ) in Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999). Keywords: LFER ionization energy substituted pyrrole; UPS substituted pyrrole; substituent effect photoelectron spectra pyrrole. We’ll tell you more about this compound (cas:2199-44-2).
The ionization energies of six 5-substituted-3-ethoxycarbonyl-2,4-dimethylpyrroles and seven 4-substituted 2-ethoxycarbonyl-3,5-dimethylpyrroles were determined by UPS. The relations between the lowest ionization potentials and σ were determined and the different influence of substituents in the α- and β-positions is discussed.
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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com