UV-vis-NIR spectroscopic studies were carried out on complex 1 in solid-state and in solution at room temperature (Figures and). The UV-vis-NIR spectrum of complex 1 in acetonitrile exhibits one broad band centered at around 1150 nm corresponding to the d-d transition ( 5 T2g → 5 E) for HS iron(II) ion in a distorted octahedral system (Figure ). The spectrum of 1 also exhibits bands at around 585, 410, 340, and 290 nm, which are described as metal-to-ligand transitions (MLCT) and or ligand-to-metal charge transfer (LMCT) transition, and intra-ligand charge transfer (ILCT) transition, respectively. The solid-state spectrum (Figure ) of complex 1 also exhibits similar absorption bands as the solution-state, suggesting complex 1 has preserved its identity in upon dissolution.