The Structure Directing Effect of Hydrogen Bonding in the Novel Polymeric Thioantimonate Mn 2 (H 2 N(CH 2 ) 2 NH 2 ) 2 Sb 2 S 5

A new transition metal thioantimonate(III) with composition Mn 2 (H 2 N(CH 2 ) 2 NH 2 )Sb 2 S 5 has been synthesised under solvothermal conditions. Two trigonal SbSb 3 pyramids and two octahedrally coordinated Mn atoms are interconnected to form Mn 2 SbS 4 heterocubanes as secondary building units (SBU’s). The SBU’s are covalently linked into linear infinite onedimensional rods. Long Sb-S bonds connect the rods to form layers. The two N atoms of the ethylenediamine molecule (en) are chelating one Mn(II) ion. The amino hydrogen atoms of the en ligand are engaged in hydrogen bonding which is responsible for the different structure pattern of the title compound compared to a previously reported series of Mn-amino-thioantimonates(III) with analogous stoichiometry built up from different amino ligands.