please solve parts 2 and 5 **Q1) Choose the correct answer in the following questions:**1. The compound with 3 electronic transitions in the UV-Visible spectrum - a) [Cr(acaac)3] - b) [Cu(phthalocyanine)] - c) [Co(NH3)5Cl]Cl2 - d) [Co(en)3]I32. In circular dichroism, CD, a plot is made between: - a) nL-nR and λ - b) εL - εR and λ - c) Φ and λ - d) n and λ3. If two optically active compounds have the same Cotton effect: - a) they have the same absolute configuration. - b) they have different absolute configurations. - c) they are enantiomers. - d) they are diastereomers.4. Which of the following compounds has optical activity? - a) [NiCl4]2- - b) Ni(NH3)2Cl2 - c) Ni(en)3 2+ - d) [Ni(NH3)6]2+5. Determine the ground state for the ion Ni2+ in octahedral fields. - a) 3A2g - b. 1T1g - c. 3A2g - d. 3T2g6. The main selection rule in IR spectroscopy: - a. spin multiplicity must stay the same - b. g⟶g transitions are not allowed - c. the vibrations must change the bond angle - d. there must be a change in the dipole moment7. The complex with a strong IR peak at around 1600 cm^-1: - a. trans-[Cr(en)2(H2O)2]Cl3 - b. [Cr(NO2)6]3- - c. [Co(en)3]3+ - d. [Cr(acac)3]**Q2) Explain how IR spectroscopy is used to indicate that complexation of a ligand with a metal has occurred.**

The circular dichroism is a spectroscopic technique widely used to determine the structure of…

2- In circular dichroism, CD, a plot is made between: a) n-no and A b) Er-Eo and A c) and X d) n and A 3-If two optically active compounds have the same Cotton effect: a) they have the same absolute configuration. b) they have different absolute configurations. c) they are enantiomers. d) they are diasteriomers. 4- Which of the following compounds has optical activity? a) [NiCl] b) Ni(NH₂)₂Cl₂ c) Ni(en), d) [Ni(NH₂)Cl₂] 5- Determine the ground state for the ion Ni in octahedral fields. a. A₂ b. T c. A d. Ta