𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Analysis of Darling-Dennison Interactions and Related Phenomena in the SO2 Molecule for the Force Field Study

✍ Scribed by Y. Morino; M. Tanimoto

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
508 KB
Volume
166
Category
Article
ISSN
0022-2852

No coin nor oath required. For personal study only.

✦ Synopsis

The famous Darling-Dennison resonance is fully discussed for the ({ }^{32} \mathrm{~S}^{16} \mathrm{O}{2}) molecule by use of the classical treatment as well as by the Van Vleck contact transformation method. The conclusion is that the single-term approximation as a resonance phenomenon, originally proposed for the (\mathrm{H}{2} \mathrm{O}) molecule by Darling and Dennison, cannot be applied to the (\mathrm{SO}{2}) molecule, because the two frequencies (\nu{1}) and (\nu_{3}) are separated by too far a distance in the latter molecule. The force field of the (\mathrm{SO}_{2}) molecule was calculated up to the quartic terms in order to confirm the above conclusions. (c) 1994 Academic Press. Inc.

📜 SIMILAR VOLUMES

The normal coordinate analysis of porphi
The normal coordinate analysis of porphin and its derivatives based on the solution of the inverse spectral problem for porphin and Cu porphin—I. A valence force field for in-plane vibrations of the porphin molecule
✍ L.L. Gladkov; K.N. Solovyov 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 620 KB

The inverse spectral problem for porphin is solved by the regularized least squares method. For determining 30 force constants related to in-plane molecular vibrations, 256 frequencies of porphin and its four deuteratcd derivatives are used. The form of the porphin molecule vibrations is discussed.

Acute and Chronic Toxicity of Veratrum V
Acute and Chronic Toxicity of Veratrum Viride††The Veratrum viride studied was the whole-powdered drug marketed by Irwin, Neisler & Co. under the name, Vertavis. The work reported herein was supported by a grant from this firm. The batch of powder used in these experiments was stated by the manufacturer to have been assayed biologically by the Craw method on Daphnia magna. One Craw unit of the material studied was stated to be 15.6mg. With regard to this assay, Mr. R. O. Craw has been so kind as to allow us to publish a brief explanation: A reference lot of Yerolrum oirid; powder was set-aside as a standard and a 10% w/v aqueous extract was made of this powder. The average median length of life in 50 assays of 1000 daphnia on immersion in the solution was determined to be 2.22 hours. The daphnia were considered dead when the heart was found to be in systolic standstill on microscopic examination. Succeeding lots of powder were assayed and their potency determined by relating the median length of life of daphnia to 2.22 hours, which is one unit. Twenty assays of 10 animals each were used on each lot of powder.‡‡The authors wish to thank Dr. J. F. A.,McManus of the Department of Pathology for a pathologic report on the tissues, and Mr. James Thomas and Mrs. Bobby E. Teague for technical assistance.
✍ Perdue, Adoline S. ;Bell, Frances ;Starnes, W.R. ;Hitchcock, Philip ;Teague, R.S 📂 Article 📅 1950 🏛 Elsevier ⚖ 346 KB 👁 1 views