Two Well-Known Complex Ions Containing Ni Are [Ni(H₂O)₆]²⁺, Which Is

Multiple Choice

Two well-known complex ions containing Ni are [Ni(H₂O) ₆]²⁺, which is green, and [Ni(en) ₃]²⁺, which is purple. Which one of these statements is true?

A) The crystal field splitting energy (Δ) is greater for [Ni(en) ₃]²⁺ than for [Ni(H₂O) ₆]²⁺.
B) [Ni(en) ₃]²⁺ absorbs energy in the red region of the spectrum.
C) Both complex ions are diamagnetic.
D) [Ni(H₂O) ₆]²⁺ transmits light with wavelengths of approximately 650-700 nm.
E) The green complex absorbs green light.