The most efficient method for synthesizing a highly pure sample of the coordination compound [Fe H2O 6]Cl3, also known as hexaaquairon III chloride, is by dissolving anhydrous iron III chloride FeCl3 in distilled water. Here's a step-by-step procedure:1. Obtain a sample of anhydrous iron III chloride FeCl3 . Make sure it is of high purity and free from any impurities or contamination.2. Measure an appropriate amount of FeCl3, considering the desired concentration of the final solution.3. Add the FeCl3 to a clean, dry beaker or flask.4. Slowly add distilled water to the beaker or flask containing the FeCl3, while stirring continuously. The FeCl3 will dissolve in the water, forming the hexaaquairon III chloride complex [Fe H2O 6]Cl3.5. Continue adding distilled water until the desired volume is reached. The solution should be a clear, yellow-orange color, indicating the presence of the [Fe H2O 6]3+ complex.Characterization of [Fe H2O 6]Cl3 using UV-Vis and IR spectroscopy:UV-Vis Spectroscopy:UV-Vis spectroscopy can be used to study the electronic transitions in the coordination compound. The [Fe H2O 6]3+ complex exhibits a d-d transition, which is responsible for its yellow-orange color. To perform the UV-Vis analysis, dilute an aliquot of the synthesized [Fe H2O 6]Cl3 solution with distilled water and transfer it to a cuvette. Measure the absorbance spectrum of the solution in the UV-Vis range 200-800 nm . The spectrum should show an absorption band in the visible region around 400-500 nm corresponding to the d-d transition of the Fe III center.IR Spectroscopy:IR spectroscopy can be used to study the vibrational modes of the ligands in the coordination compound. In the case of [Fe H2O 6]Cl3, the water molecules H2O are the ligands. To perform the IR analysis, first, prepare a solid sample of the compound by evaporating the water from the synthesized solution. Then, mix the solid sample with an IR-transparent matrix e.g., KBr and press it into a pellet. Measure the IR spectrum of the pellet in the range of 4000-400 cm-1. The spectrum should show characteristic bands corresponding to the O-H stretching around 3000-3600 cm-1 and bending around 1600-1700 cm-1 vibrations of the water ligands. Additionally, there might be a weak band corresponding to the Fe-O stretching around 400-600 cm-1 .By analyzing the UV-Vis and IR spectra, you can confirm the presence of the [Fe H2O 6]3+ complex and the water ligands in the synthesized compound.