Which of these complex ions would absorb light with the longest wavelength

Question

Quizplus · Accepted Answer

The wavelength of light absorbed is directly proportional to the energy required to promote an electron from a lower energy level to a higher energy level. In complex ions, the energy required is determined by the strength of the ligand field. The stronger the ligand field, the higher the energy required and the shorter the wavelength of light absorbed. Among the given options, the ligands in complex C (F-) create the strongest ligand field, requiring the highest energy and shortest wavelength of light absorbed. Therefore, complex C would absorb light with the shortest wavelength, and conversely, the longest wavelength of light would be absorbed by the other complexes.

Which of These Complex Ions Would Absorb Light with the Longest