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Die UV-Spektren des Tropons, des 2,7-Dimethyl-4,5-benztropons und des 2,7-Dimethyl-4,5-naphtotropons

✍ Scribed by E. Weltin; E. Heilbronner; H. Labhart

Publisher
John Wiley and Sons
Year
1963
Tongue
German
Weight
258 KB
Volume
46
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The UV, spectra and the polarizationof the individual absorption bands have been measured for tropone, 2,7‐dimethyl‐4, 5‐benzotropone and 2, 7‐dimethyl‐4, 5‐naphtotropone. The positions, relative intensities and polarizations of these bands predicted by a simplified version of the PPP‐method of configuration interaction is in excellent agreement with observation.

📜 SIMILAR VOLUMES

Untersuchungen in der Benztropylium-Reih
Untersuchungen in der Benztropylium-Reihe. IV. Die Bildungsenthalpien des 2,7-Dimethyl-4,5-benztropons, des 2,7-Dodecamethylen-4,5-benztropons und des 2,7-Pentamethylen-4,5-benztropons
✍ R. W. Schmid; Else Kloster-Jensen; E. Kováts; E. Heilbronner 📂 Article 📅 1956 🏛 John Wiley and Sons 🌐 German ⚖ 427 KB

## Abstract The enthalpies of formation of 2,7‐dimethyl‐4,5‐benzotropone (I), 2,7 ‐ pentamethylene‐ 4,5 ‐ benzotropone (III) and 2,7 ‐ dodeca‐methylene‐ 4,5‐benzotropone (II) have been determined by combustion calorimetric methods. The loss of 36 kcal/moles in delocalisation energy for III relative

Untersuchungen in der Benztropylium-Reih
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✍ T. Gäumann; R. W. Schmid; E. Heilbronner 📂 Article 📅 1956 🏛 John Wiley and Sons 🌐 German ⚖ 493 KB

## Abstract The dipole moments of 2,3‐benztropone (11), 4,5‐benztropone (III) and of 2,7 dialkyl‐substituted 4,5‐benztropones have been determined. The difference in dipole moment between II and III can be attributed to differences in geometry, rather than to varying amounts of polar character. Att

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Untersuchungen in der Benztropylium-Reihe. VI. Die polarographische Reduktion des 2,3-Benztropons, des 4,5-Benztropons und der 2,7-Polymethylen-4,5-benztropone
✍ R. W. Schmid; E. Heilbronner 📂 Article 📅 1957 🏛 John Wiley and Sons 🌐 German ⚖ 371 KB

## Abstract The polarographic half wave potentials of 2,3‐benztropone, 4,5‐benztropone, 2,7‐dimethyl‐4,5‐benztropone and 2,7‐polymethylene‐ 4,5‐benztropones have been determined. The half wave potentials of the latter series of compounds support the conclusions drawn in previous publications concer