Multiple Choice
A solution of Compound 1, shown below, absorbs light maximally at 448 nm in the absence of copper(II) ions but shifts to a 623 nm absorption maximum upon the addition of Cu2+. Which of the following best describes this process? 
A) Changes in electronic structure cause the solution to change from yellow to blue.
B) Changes in vibrational modes cause the solution to change from green to yellow.
C) Changes in the mass-to-charge ratio (m/z) cause the solution to change from violet to orange.
D) Changes in nuclear spin cause the solution to change from colorless to violet.
Correct Answer:
Verified
Correct Answer:
Verified
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