The complex ion [Co NH3 4Br2]+ can form two possible geometric isomers due to the arrangement of the ligands around the central metal ion Co . These isomers are:1. Cis-isomer: In this isomer, the two bromide Br- ligands are adjacent to each other, occupying neighboring positions on the octahedral coordination sphere.2. Trans-isomer: In this isomer, the two bromide Br- ligands are opposite to each other, occupying positions across the octahedral coordination sphere.To distinguish between these two geometric isomers experimentally, you can use the following methods:1. Infrared IR spectroscopy: The cis and trans isomers will have different IR spectra due to the differences in their bond vibrations. By comparing the IR spectra of the two isomers, you can identify which one is cis and which one is trans.2. Ultraviolet-visible UV-Vis spectroscopy: The cis and trans isomers will have different UV-Vis spectra due to the differences in their electronic transitions. By comparing the UV-Vis spectra of the two isomers, you can identify which one is cis and which one is trans.3. 1H-NMR spectroscopy: The cis and trans isomers will have different 1H-NMR spectra due to the differences in their magnetic environments. By comparing the 1H-NMR spectra of the two isomers, you can identify which one is cis and which one is trans.4. Melting point determination: The cis and trans isomers will have different melting points due to the differences in their intermolecular forces. By determining the melting points of the two isomers, you can identify which one is cis and which one is trans.5. Solubility: The cis and trans isomers may have different solubilities in various solvents due to the differences in their intermolecular forces. By comparing the solubilities of the two isomers in different solvents, you can identify which one is cis and which one is trans.