A Mixed Valent Thioantimonate(III,V): [SbS3]3– and [SbS4]3– as bidentate ligands: Solvothermal synthesis and crystal structure of {Mn(dien)2}2[MnSb2S7]

Abstract The new compound {Mn(dien) 2 } 2 [MnSb 2 S 7 ] (dien = diethylenetriamine) was obtained under solvothermal conditions and crystallizes in the orthorhombic space group P bca . The main structural motif is the [MnSb 2 S 7 ] 4– anion being constructed by a [MnS 4 ] 6– tetrahedron, a [Sb III S 3 ] 3– and a [Sb V S 4 ] 3– anion. Each thioantimonate anion shares one edge with the Mn 2+ centered cation generating the [MnSb 2 S 7 ] 4– unit. The two independent Mn 2+ cations in the two {Mn(dien) 2 } 2+ complexes are in a distorted octahedral environment of two tridentate acting dien molecules. One cation displays the λδ – λλ -conformation and the other the δλ – λδ -conformation. Several intermolecular S···H—N bonding interactions are found between the cations and the anions.