✦ LIBER ✦

77Se-1He spin-spin coupling constants in PMR spectra of 1,2,5-selenadiazole and its 3-methyl derivative

✍ Scribed by P. Bucci; V. Bertini; G. Ceccarelli; Angela De Munno

Publisher: Elsevier Science
Year: 1967
Tongue: English
Weight: 178 KB
Volume: 1
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(67)85078-4

No coin nor oath required. For personal study only.

✦ Synopsis

PMR spectra of 1, 2, 5-selenadiazole and its 3-methyl derivative have been obtained. Observed values of long range couplings between 77Se and ring protons together with other features of the spectra such as &rrical shifts and J13~_1~ are discussed and correlated with selenophene and 1. 2, s-thiadiazole PMR During the development of a research program on heterocyclic pentatomic compounds [ 1,2] the Proton Magnetic Resonance spectra of 1,2,5selenadiazole and its 3-methyl derivative have been investigated.

📜 SIMILAR VOLUMES

Spin-1/2 Nucleus Scalar Coupled to Quadr

Spin-1/2 Nucleus Scalar Coupled to Quadrupolar Nuclei: Analysis of 77Se Spectra in 2,1,3-Benzoselenadiazole

✍ P Bernatowicz; O Bjørlo; E.H Mørkved; S Szymański 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 60 KB

Determination of signs of coupling const

Determination of signs of coupling constants [1J(77Se29Si), 2J(77Se13C), 3J(77Se1H)] in 2,5-dihydro-1,2,5-selenasilaborole derivatives

✍ Bernd Wrackmeyer; Roland Köster; Günter Seidel 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 329 KB

## Abstract The signs of coupling constants [1J(^77^Se^29^Si) > 0, ^2^J(^77^Se^13^C~SiMe~) > 0,^3^J(^77^Se^1^H~SiMe~) > 0] were determined for pentaorgano‐substituted 2,5‐dihydro‐1,2,5‐selenasilaboroles [R^3^ = Me, la; R^3^ = C(Me)CH~2~, 1b], and also for derivatives in which the surroundings of t

Nuclear magnetic resonance of organophos

Nuclear magnetic resonance of organophosphorus compounds: Signs of long-range 1H31P spin-spin coupling constants in tri-(5-methyl-2-furyl)-phosphine derivatives

✍ H.J. Jakobsen; M. Begtrup 📂 Article 📅 1970 🏛 Elsevier Science 🌐 English ⚖ 847 KB

Carbon-13 NMR Spin-Lattice Relaxation an

Carbon-13 NMR Spin-Lattice Relaxation and Molecular Motion in 2-Phenyl-1,3,2-dioxarsolane and its 4-Methyl and 4,5-Dimethyl Derivatives

✍ D. W. Aksnes; K. Ramstad 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 607 KB

## Abstract ^13^C NMR spin‐lattice relaxation times (__T__~1~) have been measured as a function of temperature for three 2‐phenyl‐1,3,2‐dioxarsolanes. The __T__~1~ data have been interpreted in terms of isotropic overall molecular reorientation, internal rotation about the AsPh bond and internal m

The rα-structure of partially oriented 1

The rα-structure of partially oriented 1,2,3,5-tetrachlorobenzene determined from its 1H NMR spectra with natural-abundance 13C-satellites. A Demonstration of the Combined Use of Spectra Obtained from Molecules Dissolved in Several Different Liquid Crystals as Solvents for Spin Systems not having enough Dipolar Coupling Constants to Determine the Molecular Structure

✍ G. Dombi; J. Amrein; P. Diehl 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 322 KB

## Abstract It is demonstrated that in a case where neither the proton nor the natural‐abundance ^13^C‐satellite spectra of a partially oriented molecule carry enough structural information, one can determine the entire molecular geometry by the combined use of several liquid crystals as solvents.