7 Comment on the general features of the predicted (extremely simplified) ¹H- NMR spectrum of lycopene that is provided below. 00 6 57 PPM 3 2 1 0
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- opic 1: What IR and H-NMR peaks would you expect to see in methyl 3-oxohexanoate(see p559, attached image)? Include band position, chemical shift, splitting in your response. مللCompound A has molecular formula C8H18. It shows one singlet in the ¹H-NMR spectrum. Identify A and explain your reasoning. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph V Arial = = = = +8HE {} X² X₂ PR хо 23 V 10pt >¶ ¶< - ABC :3 v V ✓ Ev AV ¶T "Ω Θ I 用く x B Q ► 8. EA compound (L) with the molecular formula C9H10 reacts with bromine and gives an IR absorption spectrum that includes the following absorption peaks: 3035 cm ¹(m), 3020 cm ¹(m), 2925 cm ¹(m), 2853 cm ¹(w), 1640 cm ¹1(m), 990 cm ¹(s), 915 cm ¹(s), 740 cm ¹(s), 695 cm ¹(s). The ¹H NMR spectrum of L consists of: Doublet 3.1 ppm (2H) Multiplet 5.1 ppm Multiplet 7.1 (5H) ppm Multiplet 4.8 ppm Multiplet 5.8 ppm The UV spectrum shows a maximum at 255 nm. Propose a structure for compound L. Edit Drawing h
- When the 1HNMR spectrum of an alcohol is run in dimethylsulfoxide (DMSO) solvent rather than in chloroform, exchange of the Ο-H proton is slow and spin-spin splitting is seen between the Ο-H proton and C-H protons on the adjacent carbon. What spin multiplicities would you expect for the hydroxyl protons in the following alcohols? (a) 2-Methyl-2-propanol (b) Cyclohexanol (c) Ethanol (d) 2-Propanol (e) Cholesterol (f) 1-Methylcyclohexanol1H 15 2H 3H 2 2H 2H 3H ppmWhen the 1î-NMR spectrum of acetone, CH3COCH3, is recorded on an instrument operating at 200 MHz, a single sharp resonance at 2.1î is seen. (a) How many hertz downfield from TMS does the acetone resonance correspond to? (b) If the 1î-NMR spectrum of acetone were recorded at 500 MHz, what would the position of the absorption be in î units? (c) How many hertz downfield from TMS does this 500 MHz resonance correspond to?
- Predict the 13C-NMR spectrum of methyl orange in DMSO-d6. How many signals will beobserved and in which range?A 'H NMR spectrum is shown for a molecule with the molecula formula of C9H10O2. Draw the structure that best fits this dataWhat is the structure of the compound which gives rise to this data? Explain your reasoning. NMR SPECTRUM C7H80