Crystal structure of octa­kis­(4-meth­oxy­pyridinium) bis­(4-meth­oxy­pyridine-κN)tetra­kis­(thio­cyanato-κN)ferrate(III) bis­[(4-meth­oxypyri­dine-κN)pentakis­(thio­cyanato-κN)ferrate(III)] hexa­kis­(thio­cyanato-κN)ferrate(III) with iron in three different octa­hedral coordination environments

The crystal structure of the title salt, (C(6)H(8)NO)(8)[Fe(NCS)(4)(C(6)H(7)NO)(2)][Fe(NCS)(5)(C(6)H(7)NO)](2)[Fe(NCS)(6)], comprises three negatively charged octa­hedral Fe(III) complexes with different coordination environments in which the Fe(III) atoms are coordinated by a different number of thio­cyanate anions and 4-meth­oxy­pyridine ligands. Charge balance is achieved by 4-meth­oxy­pyridinium cations. The asymmetric unit consists of three Fe(III) cations, one of which is located on a centre of inversion, one on a twofold rotation axis and one in a general position, and ten thio­cyanate anions, two 4-meth­oxy­pyridine ligands and 4-meth­oxy­pyridinium cations (one of which is disordered over two sets of sites). Beside to Coulombic inter­actions between organic cations and the ferrate(III) anions, weak N—H⋯S hydrogen-bonding inter­actions involving the pyridinium N—H groups of the cations and the thio­cyanate S atoms of the complex anions are mainly responsible for the cohesion of the crystal structure.