| Autor: |
Turchaninov, V. K., Sinegovskaya, L. M., Eroshchenko, S. V., Ermikov, A. F., Trofimov, B. A. |
| Zdroj: |
Russian Chemical Bulletin; October 1991, Vol. 40 Issue: 10 p2029-2036, 8p |
| Abstrakt: |
The structure and the correlation of the molecular orbitals were studied for divinyl chalcogenides and the isoelectronic five-membered heterocyclic compounds by photoelectron spectroscopy (PES). It was shown that the two frontier p orbitals are inverted in the transition from divinyl sulfide to thiophene, while the heterocyclization of divinyl selenide is accompanied by quasidegeneration. According to PES, the orbital structure of the alkyl vinyl chalcogenides does not depend on the nature of the heteroatom (S, Se) or on the structure of the alkyl radical: p2 < p1 < s2 < s2. Linear correlations were obtained between the energies of the s1 and s2 MOs of the investigated groups of compounds, i.e., one for the vinyl Sulfides (selenides) and thiophenes (selenophenes) and another for the saturated derivatives of sulfur and selenium. The correlations in the compounds of the various chalcogens do not coincide, although they are similar. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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