Concept explainers
Propose a structure consistent with each set of data.
a.
b.
c.
Want to see the full answer?
Check out a sample textbook solutionChapter 15 Solutions
ORGANIC CHEMISTRY-STUDY GDE./SOL.MAN.
- The mass spectrum and 13C NMR spectrum of a hydrocarbon are shown. Propose a structure for this hydrocarbon, and explain the spectral data.arrow_forwardThe 1H and 13C NMR spectra of compound A, C8H9Br, are shown. Propose a structure for A, and assign peaks in the spectra to your structure.arrow_forwardCompound A, C8H10O, has the IR and 1H NMR spectra shown. Propose a structure consistent with the observed spectra, and label each peak in the NMR spectrum. Note that the absorption at 5.5 î disappears when D2O is added.arrow_forward
- Propose structures for the compound C5H10O whose 1H NMR spectra is belowarrow_forwardGiven the following NMR data, find the unknown compound. a. Identify the molecular formula; find IHDb. Identify the 1H and 13C NMR signalsarrow_forwardThe NMR spectra for compound 1 were acquired in a 7.5 mg / 0.6 mL solution ofCDCl3 . The 1H and 13C peaks are also listedbelow. Provide a full analysis of the NMR spectra for compound 1. correct assignment of NMR spectra of both 13C spectra. correct rationalisation of 13C spectrum1H NMR (400 MHz, CDCl3) δ 7.73 (d, J = 9.5 Hz, 1H), 7.56 (ddd, J = 8.5, 7.5, 1.6 Hz, 1H),7.51 (dd, J = 7.5, 1.6 Hz, 1H), 7.36 (d, J = 8.5 Hz, 1H), 7.30 (dd, J = 8.5, 7.5 Hz, 1H), 6.45(d, J = 9.5 Hz, 1H).13C NMR (101 MHz, CDCl3) δ 160.79, 154.09, 143.43, 131.85, 127.87, 124.44, 118.86,116.94, 116.74.Note: There are two carbon peaks in the 13C spectrum that are so close together that they are not differentiable at the resolution in this experiment. you should be able to assign these peaks to one of two carbon atoms in 1.arrow_forward
- Identify the carbon atoms that give rise to each NMR signal.arrow_forwardCompound C has molecular formula C5H8O. The IR, mass, 1H-NMR, and 13C-NMR spectra are shown below. Suggest a structure for C and explain your reasoning.arrow_forwardPlease help annotate all of the spectra in the picture below, thank you so so much! It is C NMR, H NMR, and MS!arrow_forward
- 2. The ¹H NMR and ¹3C spectra of compound X (C8H₁0O) together with its IR spectrum are shown below. Propose a structure for X with explanations. 8 160 % Transmittance 100 50 ChemistrySteps.com 5H 7 140 120 5 1H 100 PPM 80 PPM 60 1H ChemistrySteps.com 40 3H Chemistry min 20 mm Oarrow_forwardCalculate the degree of unsaturation. Assign the relevant peaks in the IR spectrum. Assign the peaks in the 13C NMR spectrum. Assign the peaks in the 1H NMR spectrum.arrow_forwardUse to answerarrow_forward
- Macroscale and Microscale Organic ExperimentsChemistryISBN:9781305577190Author:Kenneth L. Williamson, Katherine M. MastersPublisher:Brooks Cole