Upon increasing the temperature to 400 K, the measured T value increase slightly i.e., 3.6 cm 3 mol -1 K. Remarkably, upon cooling down, the desolvated sample 3-d exhibited a significantly different SCO behavior in comparison to the complex 3. confirming the HS Fe(II) at 292 K and 1.08-1.093 and 0.27-0.341 mm s -1 for LS state at 77 K.