## Abstract The experimental and theoretical study of electronic absorption spectra (UV) of dithienyl sulfides shows that non planar conformations are favored in vapour phase and in solution. The presence of halogen atoms in positions “ortho” to the junction of the rings induces a very important mo
Conformations Privilégiées de Dérivés des Bithiophenes: Étude par Spectroscopie d'Absorption Électronique
✍ Scribed by P. Meunier; M. Coustale; J. Arriau
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 2010
- Weight
- 484 KB
- Volume
- 87
- Category
- Article
- ISSN
- 0037-9646
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✦ Synopsis
indicates that nm planar u n f m t i c m are p -t in vapour phase and ncn polar solutions. m e existence of steric StraFn within dibraIcbithiCphens induces an increase of the twist angle. An evaluatim of this angle is carried out for eacfi carpound.
An experimental and theoretical sb3y of the W absorptim spectra of bithi-Ies spedres d'abmrptim 6 1 -des bithi@hes-2,2' et 3.3' c n t &ja 6t6 enlegistds en solutim dam le cyclohexane (1,2,3), l'hewne ( 4 ) , ou 1'6thanol (5,6). Ihe premiere analyse thhrique des spectres a 6gal-t 6M effect*
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Using parameters fitted to the pyridine spectrum, SCF calculations have been carried through for seven monoaza cyclic compounds. The results obtained are discussed in the light of available experimental data and attention is particularly drawn to the electronic spectra and the ionization potentials.