Synthesis, crystal structure and thermal properties of poly[bis­[μ-3-(amino­meth­yl)pyridine-κ(2) N:N′]bis(thio­cyanato-κN)manganese(II)]

The reaction of Mn(NCS)(2) with a stoichiometric amount of 3-(amino­meth­yl)pyridine in ethanol led to the formation of the title compound, [Mn(NCS)(2)(C(6)H(8)N(2))(2)]( n ), which is isotypic to its Zn, Co and Cd analogues. The manganese cation is located on a centre of inversion and is octa­hedrally coordinated in an all-trans configuration by two terminal N-bonded thio­cyanate anions as well as four 3-(amino­meth­yl)pyridine co-ligands, of which two coordinate with the pyridine N atom and two with the amino N atom. The 3-(amino­meth­yl)pyridine co-ligands connect the Mn(II) cations into layers extending parallel to (10 [Image: see text] ). These layers are further connected into a three-dimensional network by relatively strong inter­molecular N—H⋯S hydrogen bonding. Comparison of the experimental X-ray powder diffraction pattern with the calculated pattern on the basis of single-crystal data proves the formation of a pure crystalline phase. IR measurements showed the CN stretching vibration of the thio­cyanate anions at 2067 cm(−1), which is in agreement with the presence of terminally N-bonded anionic ligands. TG–DTA measurements revealed that the title compound decomposes at about 500 K.