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An 1H and 13C NMR study of pentane-2,4-dione tellurium(II) compounds; chemical shifts, 125Te1H and 125Te13C couplings

✍ Scribed by John C. Dewan; W. Brian Jennings; Jack Silver; Malcolm S. Tolley

Publisher
John Wiley and Sons
Year
1978
Tongue
English
Weight
362 KB
Volume
11
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

^1^H and ^13^C NMR data are reported for pentane‐2,4‐dione tellurium(II) compounds which contain a 6‐membered tellurane ring bearing methyl or ethyl substituents. The ^125^TeCH coupling constants are particularly interesting in that they are highly stereospecific, viz. ∼60 Hz and 0–8 Hz for equatorial and axial protons, respectively, in the chair conformation. ^1^J(TeC) and ^2^J(TeCC) couplings lie in the ranges 118–146 Hz and 44–49 Hz, respectively. Geminal HCH couplings in these compounds (9–11 Hz) are lower than analogous values in tellurane or in cyclohexane‐1,3‐diones.

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