SUBSTITUENT EFFECTS AND STEREOCHEMISTRY IN TE-125 NMR-SPECTROSCOPY - DIORGANYLTELLURIUM DIHALIDES AND SOME TELLURIDES AND DITELLURIDES

Authors
DUDDECK H BIALLASS A
Citation
H. Duddeck et A. Biallass, SUBSTITUENT EFFECTS AND STEREOCHEMISTRY IN TE-125 NMR-SPECTROSCOPY - DIORGANYLTELLURIUM DIHALIDES AND SOME TELLURIDES AND DITELLURIDES, Magnetic resonance in chemistry, 32(5), 1994, pp. 303-311
Citations number
32
Categorie Soggetti
Spectroscopy,Chemistry
Journal title
Magnetic resonance in chemistry → ACNP
ISSN journal
07491581
Volume
32
Issue
5
Year of publication
1994
Pages
303 - 311
Database
ISI
SICI code
0749-1581(1994)32:5<303:SEASIT>2.0.ZU;2-A
Abstract
Te-125, F-19 and C-13 NMR data for 33 compounds containing tellurium s ubstituents are presented. The Te-125 chemical shifts in (PhTeCl(2))R compounds are between delta = 878 and 1023; in corresponding (PhTeF(2) )R compounds they are 220 to 360 ppm larger. Effects of substituents a nd conformational interconversions (dynamic Te-125 NMR) are discussed. Several diastereomers were identified in (PhTeCl(2))R derivatives whi ch are stable at room temperature and differ in the configuration at t he tellurium atom (restricted pseudo-rotation). It is shown that Te-12 5 is a well suited nucleus for chiral recognition.