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- 19.8 Provide systematic names for each of the following compounds: (a) [Fe(CO)s]; (b) K3[CoF6]; (c) [Fe(OH₂)6]C12; (d) [COCI(NH3)s]SO4.6) The electrical conductance of the aqueous solution of [Co(NH:)sBr]Br2 changes on standing overnight, would you expect it to increase or decrease? Give your reason. Answer:Trimethylphosphine, P(CH3)3, can act as a ligand by donating the lone pair of electrons on the phosphorus atom. If trimethylphosphine is added to a solution of nickel(II) chloride in acetone, a blue compound that has amolecular mass of approximately 270 g and contains 21.5% Ni, 26.0% Cl, and 52.5% P(CH3)3 can be isolated. This blue compound does not have any isomeric forms. What are the geometry and molecular formula of the bluecompound?
- 3. An empirical formula is given for each of the following molecules, which contain only carbon monoxide, arene or cyclopentadienide ligands (Cp). For each molecule, figure out the formal oxidation state of the metal center(s), give an electron count (eg. 16e, 18e) and draw a plausible structure. a) (C.Ho)Fe(CO): b)(Cp)Ru(CO): c)Tc(CO)s d) Co(CO)4 e) Cp2Os NCp:Co g) [Cp:Fe]* h) [Mn(CO)s]" i) (mesitylene)Mo(CO)sHow many delectrons (nof dn) are in the central metal ion in (a) [Ru(NH3)5Cl]SO4; (b) Na2[Os(CN)6];(c) [Co(NH3)4CO3I]?6. A mixture contains at least one of the ions in the silver group (Ag*, Hg²*, Pb²+). Read the following procedure and determine which ions are present. Cold 6M HCl was added to the mixture producing a white precipitate. Hot water was then added and the solution was stirred, and the supernatant decanted to isolate a white precipitate after centrifugation. Sulfuric acid was added to one portion of the supernatant and potassium chromate was added to a second portion of the supernatant, but no precipitates formed. The isolated white precipitate was mixed well with 4 drops of concentrated ammonia. The resulting solution was centrifuged. The supernatant was decanted to show the presence of a grayish-black precipitate. To the supernatant, concentrated nitric acid was added dropwise until blue litmus paper added turned red and a white precipitate was present.
- Q 4. Which of these complexes conduct more electricity K3[CuCl5] or [Co(NH3)3Cl3] Explain?.When 2.335 g (CoH12N4Cl3) compound is treated with an excessive amount of AgNO3 solution, 1.435 g of white precipitate is obtained. Identify and name the primary and secondary coordination spheres of the compound. (Co:58.93 g/mol; H: 1.007 g/mol; N: 14.006 g/mol; Cl: 35.45 g/mol; Ag: 107.86 g/mol; Ø: 15,99 g/mol)Apply IR and 13CNMR to identify isomers of [PtCl(CO)(PMe3)(C2H4)]+
- 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.(a) What coordination geometries could [AuI4]− take and how might it differ from the [AuCl4]− ion? (b) Which of Ag(NO3) and Ag2S would be expected to be more effective at removing bromide, Br−, from solution? Explain your reasoning.Draw the structure and determine the metal-metal bond order consistent with the 18-electron rule for the following: (a) [(h5-C5H5)Fe(CO)2]2 (b) [(h5-C5H5)Mo(CO)2]22-