Pseudo-Polymeric Mercury(II) Morpholinedithiocarbamate [Hg{S2CN(CH2)4O}2]n: Supramolecular Structure (a Role of Secondary Hg···S Bonds), 13C and 15N CP-MAS NMR Spectra, and Thermal Behavior

Abstract

A new representative of mercury(II) dithiocarbamate complexes, crystalline bis(morpholinedithiocarbamato-S,S')mercury(II) with the pseudo-1D-polymeric structure, is preparatively synthesized. The structure is characterized by ¹³С and ¹⁵N MAS NMR spectroscopy and X-ray diffraction analysis (CIF file CCDC no. 1821609). Pairs of symmetric secondary Hg⋅⋅⋅S bonds (3.400 Å) combine mononuclear [Hg{S₂CN(CH₂)₄O}₂] molecules, including planar polygons [HgS₄], into a linear pseudo-polymeric chain. The study of the thermal behavior shows that the two-stage mass loss detected by thermogravimetry is due to the thermal destruction of the complex with the formation of HgS and its subsequent sublimation.