Interpretation:
The structures for the isomers A, B, and C of the compound with molecular formula, C5H11 Br are to be interpreted from the given DEPT
Concept introduction:
DEPT stands for distortionless enhancement by polarization transfer. DEPT
Presence of the electronegative compounds like halogens or oxygen or sulfur elements will downfield the signal, i.e., the chemical shift will occur at higher δ than the unsubstituted carbons.
Want to see the full answer?
Check out a sample textbook solutionChapter 9 Solutions
ORGANIC CHEMISTRY-ETEXT REG ACCESS
- Following are infrared spectra of nonane and 1-hexanol. Assign each compound its correct spectrum.arrow_forwardIdentify and draw the structure of the important peaks in the MS spectral data of C8H8O2 given below.arrow_forwardmention more significant peaks. Infrared spectrum of: 2-aminoethanolarrow_forward
- 9. (a) A compound with chemical formula C₂H₂CIBr shows the proton NMR spectrum consisting of two doublets with J-7.3 Hz. What is the molecular structure of this compound? (b) The proton chemical shifts of the two doublets from the previous question differ by 0.3 ppm. Can you consider the proton spectrum as the first order one?arrow_forwardYou are given two compounds, dimethylamine (CH3)2NH and ethanamide, CH3CONH2. a) b) c) Which compound is more basic? Explain your answer. How do you distinguish them by infrared spectroscopy? Outline an extraction method to separate a mixture of these two compounds.arrow_forwardThe 1H NMR spectrum, 13C NMR spectrum, mass spectrum, and IR spectrum below belong to a chemical with the molecular formula C4H9XO, where X is a halogen. Provide a structure for that compound. You must explain how you determined the structure for full credit based on the data bellow.arrow_forward
- 3. Consider the structure of p-xylene below to answer the following. p-xylene (a) How many peaks (absorptions) should p-xylene have in its ¹H NMR spectrum? (b) What ratio of peak areas would you expect on integration of the spectrum? (c) Use the NMR tables to approximate the chemical shifts of the signals in p-xylene.arrow_forwardThe chemical formula is C8H12O. What is it’s structure and degrees of unsaturation? What important functional groups are in the spectra, and what peaks correspond with which hydrogens and carbons in the structure predicted.arrow_forwardThe mass spectrum of 2,3-dimethylpentane also shows peaks at mlz = 57 and 43. Propose possible structures for the ions that give rise to these peaks.arrow_forward
- Part 3B Set 2. Can 1H NMR spectroscopy be used to differentiate between the two compounds? Briefly explain why or why not. Predict the 1H NMR spectrum for each compound (include integration, multiplicity, and approximate chemical shift). Either draw the actual spectrum or put in a data table format.arrow_forward12) Jessie Rosefellow is helping Dr. Ivory cook a batch of his most famous product, the ever- so finger-licking good Blue Sky ©, using a reductive amination. His role is to analyze the final product before shipping. 1) CH;NH2 2) NABH3CN ELOH a) Provide a qualitative description of what he could expect the NMR spectrum of the product to look like: for each distinct signals, provide an expected integration, multiplicity and approximate chemical shift. b) What NMR signals should he look for to demonstrate the full consumption of the starting material (i.e. identify an NMR signal that would be unambiguously assigned to the starting ketone. As in part a, provide an expected multiplicity and chemical shift)?arrow_forward2. (a) Examine the 1H NMR spectrum shown below: 3 PPM Consider the following compounds: A - D NH А В C D (i) Which compound corresponds to the NMR spectrum shown? Justify your answer. (ii) For the other three compounds not selected in (i), explain what you would expect their respective 1H NMR spectrum to look like. Justify your reasoning.arrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning