A series of complexes of the type Hg(SR) 2 have been obtained by oxidation of the metal in an acetonitrile solution of the neutral heterocyclic thiones (RSH). The crystal and molecular structures of bis(6-tertbutyldimethylsilyl)2-pyridyl disulphide (6-Bu t SidmepyS-Spy-6-Bu t Sidme) and of bis[(6-tertbutyldimethylsilyl) pyridyl-2-thionato] mercury(II), (Hg(6-Bu t SidmepyS) 2 ), have been determined by single crystal X-ray diffraction. The structure the mercury complex consists of individual centrosymmetric monomeric molecules with linear two coordination, S--Hg--S and weak intramolecular Hg--N interactions. Vibrational and 1 H, 1 3 C and 1 9 9 Hg NMR spectral data of the complexes are discussed and related to the structure.