Structure cristalline et moléculaire du thiocyanate mercurique

Abstract

Hg(SCN)2 crystals belong to the monoclinic space group C2/m with a = 10.878 Å, b = 4.042 Å, c = 6.435 Å, β = 95.28°, and Z = 2. The structure was solved by the Patterson method and refined on 217 independent observed reflections to a R factor of 0.032. All the atoms are found on the planes of symmetry of the unit cell with mercury occupying centrosymmetric positions and forming collinear Hg—S bonds to two coplanar SCN groups. An octahedral environment is achieved through weak interaction of mercury with the nitrogen atoms on four neighboring molecules.