125Te NMR SPECTRA OF TELLURIUM HETEROCYCLES

Article abstract of DOI:10.1016/S0022-328X(00)94422-X

The 125Te chemical shifts and 125Te-1H coupling constants for the heterocycle 1,3-dihydrobenzotellurophene and its dihalo oxidation products have been measured and shown to correlate with the oxidation state of the tellurium and the electronegativity of the halo substituent.Halogen exchange in mixed dihalides has also been monitored by 125Te NMR.Examination of typical Te-compounds in the oxidation states -II, +II and +IV reveals a chemical shift range of 3,500 ppm.