A series of thirteen arylmercury derivatives of α-thiopicolinanilide have been synthesizedand characterized by elemental analysis,IR,~1H NMR and MS.The intramolecular coordination andthe substituent effects on the MS and ~(199)Hg NMR behaviours have been studie6.It has been shownthat a linear correlation exists between the ~(199)Hg chemical shifts and the Hammett-Brown constantsσ~+,and the electron-donating groups cause the chemical shift to move upfield. A series of thirteen arylmercury derivatives of a-thiopicolinanilide have been synthesized and characterized by elemental analysis, IR, ~ 1H NMR and MS. The intramolecular coordination and the substituent effects on the MS and ~ (199) Hg NMR behaviors have been studie. It has been been shownthat a linear correlation exists between the ~ (199) Hg chemical shifts and the Hammett-Brown constantsσ ~ +, and the electron-donating groups cause the chemical shift to move upfield.