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- What are the coordination numbers of cobalt(III), plat-inum(II), and platinum(IV) in complexes?Discuss the binding mode and geometry of the imido and cyclopentadienyl ligands in the tungsten complex below.7. The stability of metal complexes with EDTA is due to the formation of: A) Zwitterion B) Chelate complex C) Azo dye D) Quinoid structure E) Arylmethane dye
- Explain why there is no distinction between low and high-spin arrangements for an octahedral d8 metal ion. Discuss the factors that contribute to the preference for forming either a high- or a low-spin d4 complex. How would you distinguish experimentally between the two configurations in (b)?Explain the chelate effect using Fe3+ and EDTA as the ligand and Fe3+ and 6 ammonias as ligands and provide one product in which EDTA is found.What is the identity of the orange-red complex ion formed by the reaction of ferrous ions with o-phenanthroline? Write the pertinent reaction involved.
- Write two half-equations for each reaction involved in the preparation of the complex (synthesize potassium tris(oxalato)chromium(III) trihydrate, K3[Cr(C2O4)3].3H2O ) using oxalic acid dihydrate, H2C2O4.2H2O, and potassium dichromate, K2Cr2O7, and a balanced equation for the overall reaction.Using VBT, predict the geometry of the tetraaminocadmium(II) complex ion.Why is the pH of the medium important for the formation of chelated complexes between metal ions and ligands? Choose the best answer: Select one: a. Because the ligands give rise to acid-base reactions that influence the stability of the chelate b. Because if the pH is not very acidic, the ligands do not protonate and the complex cannot form c. Because the pH of the medium is always important for any type of reaction. d. Because in the absence of pH there is no reaction of any kind