Solvothermal synthesis, crystal structure and properties of [Mn(C_6H_(18)N_4)]_4Mn_2Sb_4S_(12) containing the new hetero-metallic [Mn_2Sb_4S_(12)] core

摘要

The novel thioantimonate(III) [Mn(C_6H_(18)N_4)]_4Mn_2Sb_4S_(12) was synthesised under solvothermal conditions by reacting Mn, Sb and S in an aqueous solution of tren (=tris(2-aminoethyl)amine). In the structure MnS_4 tetrahedra and SbS_3 pyramids are linked via common corners and edges to form a new hetero-metallic [Mn_2Sb_4S_(12)] core. The [Mn(C_6H_(18)N_4)]~(2+) cations are located at the periphery of the core and are bound to the [Mn_2Sb_4S_(12)] unit via two S atoms connecting neighboured MnS_4 tetrahedra. The competition between interatomic bonding interactions and steric requirements are responsible for this observation. The thermal decomposition proceeds in one step involving a complex redox reaction.