Consider Two Complex Ions: (I) [Co(CN)₆]^3, and (II) [CoCl₆]³

question 42

Multiple Choice

Consider two complex ions: (I) [Co(CN) ₆]^3, and (II) [CoCl₆]^3. In view of the ordering of ligands in the spectrochemical series, which one of the following sets of predictions is most likely correct? Spectrochemical Series

• A)I is low spin, II is high spin, and II absorbs light at the shorter wavelength.
• B)I is high spin, II is low spin, and I absorbs light at the shorter wavelength.
• C)Both are low spin.
• D)I is high spin, II is low spin, and II absorbs light at the shorter wavelength.
• E)I is low spin, II is high spin, and I absorbs light at the shorter wavelength.

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