199Hg chemical shifts of phenylmercury thiophenolates

1. The introduction of substituents into the meta and para positions of the thiophenol ring in phenylmercury derivatives of thiophenols results in an increase in mercury shielding. 2. The presence of intramolecular coordination bonding between the metal atom and ortho substituents is demonstrated. 3. Coordinating and polar solvents increase mercury shielding.