Elsevier

Polyhedron

Volume 10, Issue 1, 1991, Pages 41-45
Polyhedron

Tetrahedral HgS4 and linear HgS2 coordination in the crystal structure of Na2Hg3S4(H2O)2

https://doi.org/10.1016/S0277-5387(00)83545-7Get rights and content

Abstract

The colourless crystalline compound Na2Hg3S4(H2O)2 obtained from the heterogeneous reaction of HgS and Na2S in DMF containing residual water, contains mercury sulphide chains {[Hg2S3]2−}∞ in which tetrahedral HgS4 units [D2 site symmetry, HgS = 2.558(2) Å] are linked along the chain by pairs of digonal mercury atoms [C2 site symmetry, HgS = 2.362(2) Å, SHgS = 166.2(1)°]. These chains are separated by {[Na2(OH2)2]2+}∞ chains, and connected to them by OHS hydrogen bonds [3.261(7) Å] and NaS contacts [2.946(5), 2.974(5) Å]. The structure embodies and mimics the coordination in both of the HgS minerals, cinnabar and metacinnabar.

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