program (Table ). The Fe-Neq bond distances lie in the range of [2.058 -2.067] Å, which is close to the value for the high-spin iron-complex at this temperature , whereas the Fe-NNCS bond distances, follow an anomalous trend where the maximum bond length of 2.026 Å is observed at 100 K, after which there is a decrease to 2.007 Å at 250 K and 2.005 Å at 295 K. The NNCS-Fe-Neq bond angles deviate from the ideal Spectroscopic studies. It is well known that porphyrins display characteristic electronic spectra and the UV-Vis/NIR spectroscopy is used to give an insight into the electronic states of the metalloporphyrin complex. The solid-state spectrum of 1 (Figure ) displays a characteristic strong absorption band at 431 nm, which is ascribed to the Soret band and two relatively weaker bands at 520 nm and 625 nm due to the Q-bands coming from the porphyrin moiety. A weak band centered at around 718 nm can be assigned to the ligand-to-metal charge-transfer band coming from NCS -→ Fe III center. There is another broad band at around 979 nm which can be attributed to the d-d transitions coming from the Fe III centre Variable-temperature Mössbauer studies. To determine the exact nature (both oxidation and spin states)