Many coordination complexes are colored due to absorption of light in the visible region of the spectrum. Which one of the following coordination complexes of transition metals is not expected to be a colored complex?Hint: Electrons transitioning between occupied and unoccupied d-orbitals produce colors in metal complexes.
A) Co(NH3) 63+
B) Cr(NH3) 62+
C) Cu(NH3) 42+
D) V(H2O) 63+
E) Zn(NH3) 42+
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