Crystal structures of bis[4-(dimethylamino)-pyridinium] tetrakis(thiocyanato-kappa N)manganate(II) and tris[4-(dimethylamino) pyridinium]pentakis-(thiocyanato-kappa N)manganate(II)

The crystal structures of the title salts, (C7H11N2)(2)[Mn(NCS)(4)] (1) and (C7H11N2)(3)[Mn(NCS)(5)] (2), consist of manganese(II) cations that are tetrahedrally (1) or trigonal-bipyramidally (2) coordinated to four or five terminal N-bonded thiocyanate ligands, respectively, into discrete anionic complexes. The negative charge is compensated by two (1) or three (2) 4-(dimethylamino)-pyridinium cations, which are protonated at the pyridine N atom. The asymmetric unit of compound 1 consists of one anionic complex and two 4-(dimethylamino) pyridinium cations, whereas that of compound 2 consists of two anionic complexes and six 4-(dimethylamino) pyridinium cations, all of them located in general positions. These complexes are linked by N-H center dot center dot center dot S, C-H center dot center dot center dot S and C-H center dot center dot center dot N hydrogen-bonding interactions between the 4-(dimethylamino) pyridinium cations and the thiocyanate ligands into three-dimensional network structures.