Abstract
The formula giving the parity-violating electroweak interaction contribution to the magnetic shielding tensor has been applied to enantiomers containing thallium. Using an extended Hückel relativistically parameterized method a chemical shift difference close to 1 mHz at 11.7 T is calculated in two couples of enantiomers. Such a difference is slightly lower than the extreme line width which may be actually reached in ultra-high resolution NMR.
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