Ultrasonic relaxation and the volume difference between the rotational isomers in 1,2-dichloroethane
β Scribed by W. Seki; P.-K. Choi; K. Takagi
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 336 KB
- Volume
- 98
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
Spectra of ultrasonic velocity and absorption
observed in 1 ,Zdichloroerhane revealed relaxation around 1.5 GHz due fo rotJtiona1 isomerism _ Andy sis of the spectra showed the important role of the volume difference between the isomers which u's estimated to be 7% with the knowledge of AH = 0.0 kcal/mol obtained by infrared experiments.
π SIMILAR VOLUMES
A method for the volume-and resonance line-selective determination of the longitudinal relaxation time in the rotating frame, T,,, is described. The spin-lock pulse intrinsic to the T,, sequence simultaneously replaces the first slice-selective pulse of the VOSY method for localized spectroscopy. Th
## Abstract Noβcarrierβadded (n.c.a.) 2β[^18^F]fluoromethylβlβphenylalanine (2β[^18^F]FMP) was found to be very sensitive to hydrolysis in aqueous solutions. In this paper, the defluorination reaction was studied in detail to elucidate its mechanism. Therefore, besides 2β[^18^F]FMP and 4β[^18^F]FMP