✦ LIBER ✦

77Se and 13C NMR spectroscopy of some 1,2,3-selenadiazoles

✍ Scribed by Helmut Duddeck; Torsten Hotopp

Publisher: John Wiley and Sons
Year: 1995
Tongue: English
Weight: 264 KB
Volume: 33
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260330614

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

^77^Se and ^13^C chemical shift of 19 1,2,3‐selenadiazoles are discussed in terms of substituent effects and conforma‐tional behaviour of the molecules. It is shown that the ^77^Se chemical shifts of such compounds are suitable tools for chiral discrimination in diastereomeric compounds.

📜 SIMILAR VOLUMES

77Se and 15N NMR investigation of some c

77Se and 15N NMR investigation of some cycloalkeno-1,2,3-selenadiazole derivatives

✍ Helmut Duddeck; Petra Wagner; Dieter Müller; Joseph Csaba Jászberényi 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 390 KB

## Abstract The ^13^C, ^15^N and ^77^Se NMR data (chemical shifts and coupling constants) of some cycloakeno‐1,2,3‐selenadiazoles are presented. Extremely large ^77^Se chemical shifts are found. ^15^N, ^77^Se coupling constants, obtained at natural abundance, are reported for the first time. Strong

13C and 77Se NMR of some selenium and th

13C and 77Se NMR of some selenium and thiophene derivatives. 1J, 2J and 3J SeSe coupling constants

✍ Pierre Granger; Stella Chpelle; Claude Paulmier 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 382 KB

## Abstract The results of ^13^C and (when pertinent) ^77^Se NMR spectra of thiopene and selenophene derivatives containing exocyclic selenium atoms are presented. The ^77^Se spectra show an interaction between nitro or carbonyl groups and selenium when they are __ortho__ to each other. The measure

13C and 77Se NMR of some organometallic

13C and 77Se NMR of some organometallic derivatives with Ti, Zr and Hf

✍ P. Granger; B. Gautheron; G. Tainturier; S. Pouly 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 328 KB

C and 77Se NMR was carried out on dicyclopentadienyl derivatives of Ti, Zr and W with selenium bonded directly to the metal. Although '"C NMR is not sensitive to different substitution, 77Se NMR is valuable and refiects the influence of the different organic substituents and the nature of the metals

1H and 13C NMR spectroscopy of substitut

1H and 13C NMR spectroscopy of substituted 1,2,3-triazoles

✍ Xiao-Wen Sun; Peng-Fei Xu; Zi-Yi Zhang 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 153 KB 👁 1 views

1-Aryl-4-carboxy-5-methyl-1,2,3-triazoles were prepared by the condensation of aryl azides with ethyl acetoacetate. The structures of these compounds were characterized by MS, IR and 1H and 13C NMR spectroscopy. The measured and calculated 13C chemical shifts of the aromatic carbons were compared.

1H, 13C, 15N, 17O and 77Se NMR of selene

1H, 13C, 15N, 17O and 77Se NMR of selenenamides

✍ Claude Paulmier; Patrice Lerouge; Francis Outurquin; Stella Chapelle; Pierre Gra 📂 Article 📅 1987 🏛 John Wiley and Sons 🌐 English ⚖ 446 KB

Numerous areneselenenamides derived from ammonia, primary and secondary amines and two N,N-bis(ary1-se1eno)alkylamines have been studied. The selenenamides bearing an electron-withdrawing substituent on the aromatic moiety are stable. The 'H, 13C and 77Se chemical shifts and some coupling constants

13C NMR spectra of some mesoionic 1,2,3-

13C NMR spectra of some mesoionic 1,2,3-triazoles

✍ C. A. Tsoleridis; N. E. Alexandrou 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 187 KB

The uC NMR spectra of three mesoionic 1,2,3-triazol-4-ylacetamides and two 1,2,3-triazol-4-ones were determined, and an evaluation of the shifts in relation to their mesoionic structure was made. A h e a r correlation between the I3C resonances and net charge densities, calculated by the CNDO/% meth