Abstract
The asymmetric unit of the title compound, {[Mn2Sb2S5(C15H11N3)2]·4H2O} n , consists of two crystallographically independent MnII ions, two unique terpyridine ligands, one [Sb2S5]4- anion and four solvent water mol-ecules, all of which are located in general positions. The [Sb2S5]4- anion consists of two SbS3 units that share common corners. Each of the MnII ions is fivefold coordinated by two symmetry-related S atoms of [Sb2S5]4- anions and three N atoms of a terpyridine ligand within an irregular coordination. Each two anions are linked by two [Mn(terpyridine)]2+ cations into chains along the c-axis direction that consist of eight-membered Mn2Sb2S4 rings. These chains are further connected into a three-dimensional network by inter-molecular O-H⋯O and O-H⋯S hydrogen bonds. The crystal investigated was twinned and therefore, a twin refinement using data in HKLF-5 [Sheldrick (2015 ▸). Acta Cryst. C71, 3-8] format was performed.
Highlights
The asymmetric unit of the title compound, {[Mn2Sb2S5(C15H11N3)2]Á4H2O}n, consists of two crystallographically independent MnII ions, two unique terpyridine ligands, one [Sb2S5]4À anion and four solvent water molecules, all of which are located in general positions
Each of the MnII ions is fivefold coordinated by two symmetry-related S atoms of [Sb2S5]4À anions and three N atoms of a terpyridine ligand within an irregular coordination
The N atoms of the amine ligands in these compounds are coordinated to the MnII ions and are always in the cis-position, arranged to form extended networks via Mn—S bond formation
Summary
Inorganic–organic chalcogenidometallates are an important class of compounds that have been systematically investigated for several decades (Sheldrick & Wachhold, 1998; Dehnen & Melullis, 2007; Zhou et al, 2009; Seidlhofer et al, 2010; Wang et al, 2016; Zhou, 2016; Zhu & Dai, 2017). In the course of these investigations we have prepared compounds with the general composition Mn2LSb2S5 or Mn2L2Sb2S5 with L as an mono-coordinating or a bis-chelating amine ligand such as, for example, methylamine, ethylamine, ethylenediamine or 1,3-diaminopropane (Bensch & Schur, 1996; Schur & Bensch, 2002; Schur et al, 2001) All of these compounds consist of SbS3 pyramids as primary building units as well as MnS6 and MnS4N2 distorted octahedra. Only two of the six coordination sites of the MnII cations are accessible for Mn—S bond formation This compound consists of discrete [Sb2S5]4À anions, in which two SbS3 pyramids are joined together via a common sulfur atom, which is in contrast to the compound mentioned above, where the SbS3 units are linked by common sulfur edges into chains. This compound decomposes on storage, presumably because of the loss of the water molecules
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