Carbon-13 nuclear magnetic resonance studies of organotellurium compounds. II. Chemical shift trends

Article abstract of DOI:10.1139/v82-088

13C nmr chemical shifts are reported for some aromatic and aliphatic tellurium compounds.For a given organic group, the shift of the C¹ atom varies in the order RTeCl4^- >/= RTeCl3 > R2TeCl2 > R2Te > R2Te2, as expected from electronegative considerations.The C² atom experiences an opposite trend while the C³ and C⁴ atoms of the ring experience smaller changes.The chemical shifts of para-substituted aromatic tellurium compounds do not show additivity of contributions from the substituents.