Aus zahlreichen von uns durchgefuhrten Untersuchunpn mit der Gleichstrom-und der Wechselstrompolarographie ergibt sich, daO zur Bestimmung von TB-Gehalten 2 1% in DB auch die Gleichstrompolarographie geeignet ist ; bei graleren Anspruchen an Genauigkeit, und Empfindlichkeit (TB 2 O,lo/,) ist die Wec
Zur Berücksichtigung der Elektronenwechselwirkung in der Elektronengasmethode
✍ Scribed by H. Labhart
- Publisher
- John Wiley and Sons
- Year
- 1956
- Tongue
- German
- Weight
- 512 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Coulomb‐ and exchange integrals in FE MO theory may be expressed in terms of an effective distance between the volume elements of the interacting charge distributions. This effective distance is calculated theoretically in dependence of the geometrical distance. The obtained curve compares favorably with points determined semiempirically from the benzene spectrum by Ham and Ruedenberg as well as with Kuhns heuristic curve. Application to the ethylene spectrum gives for the first excited singlet state 9.7 eV and for the singlet‐triplet splitting 4.0 eV in somewhat better agreement with experiment than purely theoretical LCAO MO theory.
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