Using the following abbreviated spectrochemical series, determine which complex ion is most likely to absorb light in the red region of the visible spectrum. small splitting Cl^-

Question

Using the following abbreviated spectrochemical series, determine which complex ion is most likely to absorb light in the red region of the visible spectrum. small splitting Cl^- < H₂O < NH₃ < CN^- large splitting A)[CuCl₄]^2- B)[Cu(H₂O)₄]²⁺ C)[Cu(NH₃)₄]²⁺ D)[Cu(CN)₄]^2- E)not enough information given to determine

Quizplus · Accepted Answer

The complex ion [CuCl₄]^2- has the smallest ligand field splitting energy due to Cl^- being a weak field ligand. This results in the absorption of light with longer wavelengths, such as red.

Using the Following Abbreviated Spectrochemical Series, Determine Which Complex Ion