The coordination geometry of a cobalt III complex with the empirical formula CoCl3 NH3 3 can be determined using various spectroscopic techniques, such as UV-Vis spectroscopy, IR spectroscopy, and NMR spectroscopy. Let's discuss how each technique can help us determine the coordination geometry.1. UV-Vis spectroscopy: This technique can provide information about the electronic transitions in the complex, which can be related to the coordination geometry. In the case of CoCl3 NH3 3, the cobalt III ion has a d6 electronic configuration. If the complex exhibits a single peak in the visible region, it suggests an octahedral geometry. If it exhibits multiple peaks, it may indicate a different geometry, such as tetrahedral or square planar.2. IR spectroscopy: This technique can provide information about the vibrational modes of the ligands in the complex. In the case of CoCl3 NH3 3, we can look for the stretching frequencies of the N-H bonds in the NH3 ligands and the Co-N bonds. If the complex has an octahedral geometry, we would expect to see a single N-H stretching frequency and a single Co-N stretching frequency. If the geometry is different, we may observe multiple stretching frequencies.3. NMR spectroscopy: This technique can provide information about the chemical environment of the ligands in the complex. In the case of CoCl3 NH3 3, we can look for the chemical shifts of the NH3 ligands and the Cl ligands. If the complex has an octahedral geometry, we would expect to see a single resonance for the NH3 ligands and a single resonance for the Cl ligands. If the geometry is different, we may observe multiple resonances.Based on the spectroscopic data, if we observe a single peak in the UV-Vis spectrum, a single N-H stretching frequency and a single Co-N stretching frequency in the IR spectrum, and single resonances for the NH3 and Cl ligands in the NMR spectrum, we can conclude that the coordination geometry of the CoCl3 NH3 3 complex is octahedral. This is consistent with the typical coordination geometry of cobalt III complexes, which often form octahedral complexes with six ligands surrounding the central metal ion.