Single crystal x-ray diffraction analysis showed that the complex crystallizes in the triclinic P1 space group. The Fe(II) ion sits in a N6 coordination environment where two axial N atoms come from two isoselenocyanate anions, and four N atoms are from two ligands (Fig. ). Temperature-dependent solid-state magnetic susceptibility measurement on the complex 7 revealed a gradual spin-state switching in the temperature range of 200 to 400 K (Fig. ). At 400 K, the T value of 3.98 cm 3 mol -1 K is observed and in good agreement with the typical mononuclear Fe(II) HS species. The T value drops to 0.78 cm 3 mol -1 K at 200 K upon cooling, indicating the thermally induced SCO process. Solution-based magnetic studies were also performed via Evans method NMR in deuterated DMF solvent in the temperature range of 233-353 K, showing a similar gradual profile of the SCO process with T value varying from 0.68 to 3.90 cm 3 mol -1 K from 233 to 353 K (Fig. ). The T1/2 value for the SCO process was observed at 295 K for the solid state while 265 K in the solution state since dilution in the solution can largely reduce the co-operativity in between the SCO centers.