To confirm the differences in molecular structures as well as the long-term stability of the complexes in solution, 1 H NMR spectroscopy was recorded in DMF-d7 over a period of seven days, as shown in Figure and Figure S7-S12. Additionally, the kinetics studies proved that all complexes do not degrade in the solution hence remain stable for a period of seven days. The spectra of all the complexes were further compared with the ligand (L) to understand the electronic effect of the presence of metal and halide ancillary ligand over the proton resonances in the complexes (Figure ). The proton NMR spectrum of L consists of six resonance peaks at 9.45, 9.29, 8.00, 7.96, 7.57, 7.25 ppm as expected from the rigid symmetric molecule. The 1 H NMR spectra of all the complexes show single resonance peaks for each of the associated protons which further confirms the magnetic equivalence and high symmetry of the complexes in solution.