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- 示 (C) (D) (A) (B) Which is the crystal field energy level diagram for a square pyramidal ML5 complex that contains a single ligand on the z-axis? O (D) O (A) O (B) O (C)(a) Give systematic names for the following formulas: - [Co(N3)(NH3)s]SO4 - KĄ[Fe(CN);ONO] - [Pt(en)2][PtCl4] (b) Provide the formula with the given systematic names: - Sodium pentachloronitridoosmate(VI) - Pentaammineisothiocyanatocobalt(III) chloride - Potassium diaquabis(oxalato)manganate(III) (c)Write the formula of possible isomer structure for [Co(NH3)sBr]SO4 complex. Define the type of isomerism and explain how you can differ them?Sketch the structure of the complex in each of the follow- ing compounds and give the full compound name: (a) cis-[Co(NH3)4(H,O),](NO;)2 (b) Na,[Ru(H,O)Cl5] (c) trans-NH4[Co(C;04)2(H2O)z] (d) cis-[Ru(en);Cl2]
- 5.) Draw the octahedral crystal field splitting energy diagram for the following metal ions: (a) Cu²+ (b) Mn2+(low- spin) (c) Fe(high-spin) (d) Co³ (high spin)The extent of crystal field splitting is often determined from spectra. (a) Given the wavelength (λ) of maximum absorption,find the crystal field splitting energy (Δ), in kJ/mol, for each ofthe following complex ions:(b) Construct a spectrochemical series for the ligands in the Cr complexes. (c) Use the Fe data to state how oxidation state af-fects Δ. (d) Use the Co, Rh, and Ir data to state how period num-ber affects Δ.The SCN – ligand is an ambidentate ligand. When it is S-bound, it has the name thiocyanate, and the M–S–C bond angle is bent. When it is N-bound, it has the name isothiocyanate, and the M–N–C bond angle is ~180 ̊. (a) Draw Lewis dot structures for M–NCS and M–SCN that explain the observed geometries. (b) Predict the structures of the metal-ligand bonding when SCN– reacts with Fe 2+ to form the bright red Fe(SCN)2+ ion. (c) Predict the method of bonding when Cr3+ reacts with the SCN – ligand
- Explain the following :(i) Low spin octahedral complexes of nickel are not known.(ii) The π-complexes are known for transition elements only.(iii) CO is a stronger ligand than NTL, for many metals.Draw the crystal field diagram of [W(CO)6]. Determine the (a) Electronic configuration in terms t2geg (b) Number of unpaired electrons (c) Ligand field stabilization energy in terms of ΔO or ΔT(a) Using Werner’s definition of valence, which property isthe same as oxidation number, primary valence or secondaryvalence? (b) What term do we normally use for the othertype of valence? (c) Why can NH3 serve as a ligand but BH3cannot?
- (a) A compound with formula RuCl3 . 5 H2O is dissolved inwater, forming a solution that is approximately the samecolor as the solid. Immediately after forming the solution,the addition of excess AgNO3(aq) forms 2 mol of solid AgClper mole of complex. Write the formula for the compound,showing which ligands are likely to be present in the coordinationsphere. (b) After a solution of RuCl3 . 5 H2O hasstood for about a year, addition of AgNO3(aq) precipitates 3mol of AgCl per mole of complex. What has happened inthe ensuing time?Predict the products of the following reactions and balance the equations.(a) Zn is added to a solution of Cr2(SO4)3 in acid.(b) FeCl2 is added to a solution containing an excess of Cr2O72− in hydrochloric acid.(c) Cr2+ is added to Cr2O72− in acid solution.(d) Mn is heated with CrO3.(e) CrO is added to 2HNO3 in water.(f) FeCl3 is added to an aqueous solution of NaOH.Give formulas and the geometry around the central metal ion corresponding to the following; a) Bromochlorodiaquadimineaaluminum(III) nitrate b) Barium tetrabriniferrate(III) c) Dibromobis(ethylenediamine)cobalt(III) sulfate