Hydrothermal synthesis and crystal structure of the new manganese(II) thioantimonate(III), Mn(en)(3)Sb4S7

The reaction of manganese with antimony and sulfur in an aqueous ethylenediamine ten) solution under hydrothermal conditions gives Mn(en)(3)Sb4S7. The structure of the title compound consists of Mn(en)(3)(2+) cations and infinite one-dimensional (Sb4S72-)n anions forming slabs via long secondary interchain Sb...S bonds. A comparison between phases with polymeric (Sb4S72-)(n) anions shows in general a trend towards a lower dimensionality of the thioantimonate assembly with increasing cation size. In the title compound the lowest number of interchain Sb...S interactions is observed among other phases with chainlike Sb4S72- anions.