1- The compound with 3 electronic transitions in the UV-Visible spectrum a) [Cr(acaac)] b) [Cu(phthalocyanine)] c) [Co(NH₂),CI]Ch₂ d) [Co(en)]l 2- In circular dichroism, CD, a plot is made between: a) n-no and A b) ErEo and X 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.

Chemistry
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Chapter21: Transition Metals And Coordination Chemistry
Section: Chapter Questions
Problem 108IP: a. In the absorption spectrum of the complex ion Cr(NCS)63, there is a band corresponding to the...
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please solve parts 1, 2 and 3

Q1)
Choose the right answer in the next questions:
1- The compound with 3 electronic transitions in the UV-Visible spectrum
d) [Co(en)]l
a) [Cr(acaac)] b) [Cu(phthalocyanine)] c) [Co(NH₂),CI]Cl₂
2- In circular dichroism, CD, a plot is made between:
a) n-no and A b) E-E and A c) and A 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 Ni² in octahedral fields.
a. A₂ b. T
c. 'A d. Tax
6- The main selection rule in IR spectroscopy:
a. spin multiplicity must stay the same
b.gg transitions are not allowed
c. the vibrations must change the bond angle
d. there must be a change in the dipole moment
7- The complex with a strong IR peak at around 1600 cm¹:
a. trans-[Cr(en),(H₂O), Cl, b. [Cr(NO₂) c. [Co(en)]" d. [Cr(acac)3]
02
Explain how IR spectroscopy is used to indicate that complexation of a
ligand with a metal has occurred.
Transcribed Image Text:Q1) Choose the right answer in the next questions: 1- The compound with 3 electronic transitions in the UV-Visible spectrum d) [Co(en)]l a) [Cr(acaac)] b) [Cu(phthalocyanine)] c) [Co(NH₂),CI]Cl₂ 2- In circular dichroism, CD, a plot is made between: a) n-no and A b) E-E and A c) and A 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 Ni² in octahedral fields. a. A₂ b. T c. 'A d. Tax 6- The main selection rule in IR spectroscopy: a. spin multiplicity must stay the same b.gg transitions are not allowed c. the vibrations must change the bond angle d. there must be a change in the dipole moment 7- The complex with a strong IR peak at around 1600 cm¹: a. trans-[Cr(en),(H₂O), Cl, b. [Cr(NO₂) c. [Co(en)]" d. [Cr(acac)3] 02 Explain how IR spectroscopy is used to indicate that complexation of a ligand with a metal has occurred.
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