Deutsch
Froelich, Wolfgang and Dewey, Harry J. and Deger, Hans and Dick, Bernhard and Klingensmith, Kenneth A. and Puettmann, Wilhelm and Vogel, Emanuel and Hohlneicher, Georg and Michl, Josef (1983) Excited singlet states of "hairpin" polyenes. Journal of the American Chemical Society 105 (20), pp. 6211-6220.
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Abstract
The synthesis and UV-visible, polarized-fluorescence and MCD spectra of 6 U-shaped hairpin polyenes (e.g., I) are reported. Qual. arguments and results of p-electron calcns. permit the identification of 4 excited singlet states and their assignment to mixts. of singly and doubly excited configurations. The hairpin polyenes represent a link between the all-trans-polyenes on the 1 hand and the annulenes and acenes on the other; they have the topol. of the former and a geometry near that of the latter.
| Item Type: | Article | ||||||
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| Additional information (public): | CAN 99:139187 22-9 Physical Organic Chemistry 1070-89-9 Role: PRP (Properties) (Wittig reaction of methyltriphenylphosphonium bromide with diformylcycloheptatriene in presence of); 1779-49-3 Role: RCT (Reactant), RACT (Reactant or reagent) (Wittig reaction of, with sodium bis(trimethylsilyl)amide and diformylcycloheptatriene); 55759-42-7 Role: RCT (Reactant), RACT (Reactant or reagent) (Wittig reactions of, divinylbicyclododecapentaene and tricycloheptadecaheptaene from); 60237-65-2 Role: RCT (Reactant), RACT (Reactant or reagent) (Wittig reactions of, divinyltricycloheptadecaheptaene and tetracyclodocosanonaene from); 4692-14-2P; 50785-96-1P; 68539-85-5P; 86846-94-8P; 86846-95-9P; 86846-96-0P Role: SPN (Synthetic preparation), PREP (Preparation) (prepn. and excited singlet states of); 7333-67-7 Role: RCT (Reactant), RACT (Reactant or reagent) (reaction of, with butyllithium and diformylcycloheptatriene); 28172-94-3 Role: PRP (Properties) (treatment with methyltriphenylphosphonium bromide and sodium bis(trimethylsilyl)amide, divinylcycloheptatriene from) | ||||||
| Institutions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry III - Physical Chemistry (Light and Matter) > Prof. Dr. Bernhard Dick | ||||||
| Identification Number: |
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| Keywords: | Electron configuration; Fluorescence; Magnetic circular dichroism; Ultraviolet and visible spectra (of hairpin polyenes); Molecular orbital (PPP-CI, of hairpin polyenes); Energy level excitation (singlet, of hairpin polyenes); polyene hairpin UV fluorescence; excited singlet hairpin polyene; electron configuration hairpin polyene; MO hairpin polyene | ||||||
| Subjects: | 500 Science > 540 Chemistry & allied sciences | ||||||
| Status: | Published | ||||||
| Refereed: | Yes, this version has been refereed | ||||||
| Created at the University of Regensburg: | No | ||||||
| Owner: | Universitätsbibliothek Regensburg | ||||||
| Deposited On: | 19 Jan 2009 12:01 | ||||||
| Last Modified: | 17 Jan 2012 15:26 | ||||||
| Item ID: | 5549 |
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