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Explain why compounds of Zn2+ are white, but compounds of
Cu2+ are often blue or green?
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- . Explain why compounds of Sc3+ are colorless, but compounds ofTi3+ are colored?Name the compound [η2-C2H4)(η5-Cp)Ru(CO)2]+ and show whether it obeys the 18 electron rule.Which of the following compounds follow the effective atomic number rule, and which do not?(27Co, 46Pd, 48Cd, 80Hg) K2[HgI4] [CdI4]2-, Co2CO8 (no bridging ligand) [Pd(NH3)2Cl2]
- [Ni(NH3)4CI2] does not exhibit Jahn- Teller distortion. Explain Answer:Indicate how many stereoisomers are possible for each compound. - square planar [Pt(NH3)Br22]: - tetrahedral [NiClBr3]2−: - octahedral [PtCl4Br2]2−:A student prepared three nickel samples in the lab but forgot to label them. The samples that were prepared were [Ni(H₂O)6]2+, [Ni(NH3)612+, and [Ni(H₂NCH₂CH₂NH₂)3]2+. The sample vials were coloured violet, blue, and green. Which sample corresponded to which coloured vial? O [Ni(H₂O)6]2+ = green; [Ni(NH3)6]2+ = blue; [Ni(H₂NCH₂CH₂NH2)3]²+ = violet O [Ni(H₂O)6]2+ = violet; [Ni(NH3)%]2+ = green; [Ni(H,NCH,CH,NH,)3]2+ = blue O [Ni(H2O)%]2+ = violet; [Ni(NH3)%]2+ = blue; [Ni(H,NCH,CH,NH2)3]2+ = green O [Ni(H2O)%]2+ = green; [Ni(NH3)]2+ = violet; [Ni(H2NCH,CH,NH,)3]2+ = blue O [Ni(H,O),]2+ = blue; [Ni(NH3)%]2+ = green; [Ni(H,NCH,CH,NH2)2+ = violet
- Based on the change in color would you expect [Co(NH3)5Cl]2+ to have a larger or smaller value of ∆ than [Co(NH3)6]3+? Is this prediction consistent with the spectro-chemical series?(b) [Zn(II)(H20)6]²* can undergo successive reactions with phen ligands: [Zn(I)(H2O)6]?* + phen [Zn(II)(H2O)«(phen)]²* + phen [Zn(II)(H2O)2(phen)2]²* + phen [Zn(II)(H2O)«(phen)]²* + 2H2O log KA = 6.31 [Zn(II)(H2O)2(phen)2]2* + 2H2O [Zn(II)(phen)3]** + 2H2O log K2 = 6.09 log Kz = 4.77 Explain the decrease in successive log Km values as the number of phen ligands increases and calculate log ßa for the overall reaction: [Zn(II)(H2O)c]²* + 3 phen [Zn(II)(phen)3]?* + 6H2O (c) Explain why each of the complexes above are colourless and diamagnetic. Which would be more stable: [Ni(1I)(phen)3]²* or [Zn(1I)(phen)3]²* based on electronic configuration?6. KCo[Fe(CN)6] has an unusually low-energy charge transfer band at 550 nm. When this compound is irradiated with 550 nm laser light, at low temperatures, the compound becomes magnetic. Explain what is happening.
- Which of the following will exhibit cis-trans isomerism? Fe°: [Ar]4s23d6 Cdº: [Kr]5s²4d²0 Pto: [Xe]6s25d® A. [FeBr2Cl2]2- B. [Cd(NH3)2(H2O)2]2+ C. [PtBr2(NH3)2] D. All of the above.Co(NH3)4C1803]+ + 2H3O+ →1.20 [Co(NH3)5(H2O)]3+ + 2H2O + CO2 If the oxygen atoms of the coordinated carbonate were labeled with 180, where in the products the labeled oxygen will end up * ?When trans-[CrCl2(NH3)4] * is reacted with one equivalent Nal, trans- and cis- [CrCl(I) (NH3)4] * are obtained. However, only trans-[COCI(I)(NH3)4] * forms when Nal is reacted with the trans-[CoCl2(NH3)4] * .