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Tellurium NMR

PHYSICAL PROPERTIES
 

Isotope
Natural 
Abundance
(%)
Nuclear
Spin
(I)
Magnetogyric
ratio
(107*rad/T*s)
Quadruple 
moment
(1028*Q/m2)
Resonance
frequency
(MHz)
at 11.744T
(500 MHz for 1H)
Relative 
sensitivity
(1H=1.00)
Absolute 
sensitivity
(1H=1.00)
 123Te
0.89 
1/2 
 -7.059098
0 
131.039
1.8*10-2 
 1.56*10-4
125Te
7.07
1/2
-8.5108404
0
157.984
3.15*10-2
2.2*10-3
 

APPLICATION FIELDS

125Te NMR spectroscopy has been successfully applied on organometallic and inorganic tellurium-containing compounds due to its excellent sensitivity with compared to the 123Te isotope.
NMR REFERENCES
Me2Te in neat/benzene is a common standard (the absolute frequency is 31.549769 MHz with respect to 100.00 MHz of the TMS signal. In some cases, data is also referenced to Ph2Te2 in CDCl3 (422 ppm). Also see IUPAC recommendations for reporting the NMR chemical shits of all nuclei relative to the 1H resonance of TMS (02JMR323-156).
NMR PARAMETERS
  •  125Te chemical shifts (strong dependence with temperature and solvent). Range between +3200ppm and -1200ppm.
  • nJ(125Te,X) coupling constants can be measured with simplicity by analyzing the corresponding 125Te satellite lines.
  • Typical T1 values in the 1-30s range
    • NMR EXPERIMENTS
  • 1D 125Te spectrum.
  • Variable temperature experiments for conformational studies.
  • 2D 125Te-1H correlation experiment ( 97MRC752 ).
  • 2D 125Te-13C correlation experiment ( 94CONC293 ).
    • BIBLIOGRAPHY
    Group VI NMR: B79HAR383, 00ENC722 .
    More info on 125Te NMR spectroscopy in the following reviews:

    95MRC441

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