The Spectrochemical Series - The Spectrochemical Series By:...

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The Spectrochemical Series By: Lionel Sims III Lab Instructor: Roy November 30, 2007
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Results and Discussion : The experiment for this week focused on transition metal complexes, you see transition metal complexes can be in a variety of colors which are due to the absorption of visible light by the complexes. The color of the light absorbed is complementary to the color that is seen. The wavelength of the colors of the absorbed light can be calculated by the difference in energy (ΔE) using the equation E = hc / λ. Different energy levels are seen from transition metal complexes because of the crystal field theory. The crystal field theory states that when the negatively charged ligands are brought near the transition metal, the energies of the five degenerate d orbitals change by different amounts. The difference in energy of the orbitals is called the crystal field splitting (Δ). The magnitude of the crystal field splitting depends on the identity of the transition metal and the ligand. If the ligand is kept constant, the crystal field splitting varies according to a certain order. This series has come to be called the spectrochemical series. The series is described thusly, Br - < Cl - < F - < H 2 O < NH 3 In this experiment particular cobalt compounds were synthesized and then during
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The Spectrochemical Series - The Spectrochemical Series By:...

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