The synthetic transformation, as indicated in the scheme below, has been attempted, and a single isolated product has been obtained. The C=O ligands in the isolated product produce two frequencies in the infra-red spectrum and two frequencies in the Raman spectrum. These bands are not coincident. Deduce, using group theory, if the starting material A has been retained or if ONE of the products, B, C or D, has been formed. A (D3) L A 10 B (C₂) D (C₂) 04.110. C (DA)

Organic Chemistry
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Chapter15: Benzene And Aromaticity
Section15.SE: Something Extra
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2. The synthetic transformation, as indicated in the scheme below, has been attempted, and a
single isolated product has been obtained. The C=O ligands in the isolated product produce
two frequencies in the infra-red spectrum and two frequencies in the Raman spectrum.
These bands are not coincident. Deduce, using group theory, if the starting material A has
been retained or if ONE of the products, B, C or D, has been formed.
201
O
A (D3)
L
A
冰
B (C₂)
Jok
•MIL
·M110.
C(Db)
D (C₂)
N.B. The identity of the ligand, L, can be taken to be a single atom to simplify analysis.
You must include the following in your answer:
The reducible representation of Ico for each complex
The irreducible representation of Ico for each complex, stating clearly which labels are
infra-red and / or Raman active. The reduction formula must be used to deduce the
labels present for each complex
Which complex has been synthesised and brief reasoning for your answer
Transcribed Image Text:2. The synthetic transformation, as indicated in the scheme below, has been attempted, and a single isolated product has been obtained. The C=O ligands in the isolated product produce two frequencies in the infra-red spectrum and two frequencies in the Raman spectrum. These bands are not coincident. Deduce, using group theory, if the starting material A has been retained or if ONE of the products, B, C or D, has been formed. 201 O A (D3) L A 冰 B (C₂) Jok •MIL ·M110. C(Db) D (C₂) N.B. The identity of the ligand, L, can be taken to be a single atom to simplify analysis. You must include the following in your answer: The reducible representation of Ico for each complex The irreducible representation of Ico for each complex, stating clearly which labels are infra-red and / or Raman active. The reduction formula must be used to deduce the labels present for each complex Which complex has been synthesised and brief reasoning for your answer
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