What is a characteristic clinical manifestation of Wilson disease? O Tremor O Excessive salivation O Cafe-au-lait spots O Kayser-Fleischer rings that encircle the iris
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Wilson disease is a genetic disorder that causes copper to accumulate in the body, particularly in the liver, brain, and eyes. Let's evaluate each option: * **Tremor:** Neurological symptoms are common in Wilson disease due to copper accumulation in the brain. Show more…
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(a) Place the ligands I⁻, NCS⁻ (S-coordinated), SCN⁻ (N-coordinated), and H⁻ in an order of ligand field strength in the spectrochemical series and explain how you arrive at your answers. (b) Correlate the strength of the above ligands to the ligand field splitting (Δₒ) in an octahedral complex, and illustrate your answer with the aid of simplified molecular orbital diagrams. State what types of ligand class do each of these four ligands belong to. (c) For the linkage isomers of a metal complex of metal centre M with low-spin d⁶ electronic configuration, [(L)₅M(SCN)]²⁺ and [(L)₅M(NCS)]²⁺, one of them is orange in colour and the other is violet in colour (L = monodentate charge-neutral ligand). Please match the colour to the correct complex and explain how you arrive at your choice.
Adi S.
(418.5 nm, 1.440 A.U) (773.5 nm, 0.517 A.U) The tetrahedral tetrachloronickelate(II) ion, [NiCl4]2–, spectrum is presented above. (the first value is λmax the second is A.U which stands for Absorbance Units). Another Nickel octahedral complex forms with an unknown strong field ligand. The λmax for this complex is 375 nm in the UV and 650 in the visible region of the spectrum. Answer the following: 1. Write out the electronic configuration for Ni+2. 2. Sketch the splitting of the d orbitals to the t2g and eg levels for the weak field tetrahedral [NiCl4]2– complex as well as the octahedral unknown strong field complex. 3. Which complex is low spin (diamagnetic) and which hi spin (paramagnetic)? 4. Calculate the energy or Δ for 1 photon to be excited from the t2g level to the higher eg for the [NiCl4]2– complex in the UV and Vis as well as the unknown complex in the UV and Vis (4 calculations total). 5. The concentration of each complex is 0.05M. Calculate the E absorbed by 1 mL of solution (for each ligand) assuming each complex absorbs only 1 photon.
Supreeta N.
During the extraction of $\Lambda g$ and $\Lambda \mathrm{u}$, using an excess of $\mathrm{KCN}$, soluble complexes are formed. These complexes, which have $10 \mathrm{~d}$ -electrons in $\Lambda \mathrm{g}$ and $\Lambda \mathrm{u}$, are (a) $\mathrm{K}_{2}[\mathrm{~A} g(\mathrm{CN})]$ and $\mathrm{K}_{2}\left[\mathrm{Au}(\mathrm{CN})_{3}\right]$ (b) $\mathrm{K}_{4}\left[\Lambda g_{6}(C \mathrm{~N})_{10}\right]$ and $\mathrm{K}_{4}\left[\mathrm{~A}_{4},(\mathrm{CN})_{16}\right]$ (c) $\mathrm{K}_{2}\left[\mathrm{Ag}(\mathrm{CN})_{\mathrm{t}}\right]$ and $\mathrm{K}_{\mathrm{3}}\left[\mathrm{Ag}(\mathrm{CN})_{4}\right]$ (d) $\mathrm{K}\left[\mathrm{A} g(\mathrm{CN})_{2}\right]$ and $\mathrm{K}\left[\mathrm{A} \mathrm{u}(\mathrm{CN})_{2}\right]$
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