Part 1 of 2 Identify the isomer of CH₁ that has the 1 H NMR spectrum shown. Select the single best answer. 10 5 H 3 H 12 11 10 9 8 7 6 5 4 3 2 1 0 m-xylene O ethylbenzene ○ o-xylene 3,5-octadiene ○ p-xylene Part 2 of 2 ppm Identify the isomer of CH C₁₂ that has the 13C NMR spectrum shown. Select the single best answer. 220 200 180 160 C CH₂ CH3 140 120 100 80 60 40 20 0 ppm 1,2-dichlorobutane O 1,2-dichloro-2-methylpropane O 1,3-dichlorobutane 2,3-dichlorobutane O 1,4-dichlorobutane G

Part 1 of 2 Identify the isomer of CH₁ that has the 1 H NMR spectrum shown. Select the single best answer. 10 5 H 3 H 12 11 10 9 8 7 6 5 4 3 2 1 0 m-xylene O ethylbenzene ○ o-xylene 3,5-octadiene ○ p-xylene Part 2 of 2 ppm Identify the isomer of CH C₁₂ that has the 13C NMR spectrum shown. Select the single best answer. 220 200 180 160 C CH₂ CH3 140 120 100 80 60 40 20 0 ppm 1,2-dichlorobutane O 1,2-dichloro-2-methylpropane O 1,3-dichlorobutane 2,3-dichlorobutane O 1,4-dichlorobutane G

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter13: Structure Determination: Nuclear Magnetic Resonance Spectroscopy

Section13.8: More Complex Spin–spin Splitting Patterns

Problem 15P: 3-Bromo-1-phenyl-1-propene shows a complex NMR spectrum in which the vinylic proton at C2 is coupled...

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How could you use 1H and 13C NMR to help distinguish the following isomeric compounds of the formula C4H8?
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Assign as many resonances as you can to specific carbon atoms in the 13C NMR spectrum of ethyl benzoate.
3-Bromo-1-phenyl-1-propene shows a complex NMR spectrum in which the vinylic proton at C2 is coupled with both the C1 vinylic proton (J = 16 Hz) and the C3 methylene protons (J = 8 Hz). Draw a tree diagram for the C2 proton signal, and account for the fact that a five-line multiplet is observed.
A compound of unknown structure gave the following spectroscopic data: Mass spectrum: M+=88.1 IR: 3600 cm-1 1Î—NMR: 1.4 Î´ (2 H, quartet, J=7 Hz); 1.2 Î´ (6H, singlet): 1.0 Î´ (1 H, singlet); 0.9 Î´ (3 H, triplet, J=7 Hz) 13CNMR: 74, 35, 27, 25 Î´ (a) Assuming that the compound contains C and H but may or may not contain O, give three possible molecular formulas (b) How many protons (H) does the compound contain? (c) What functional groups(s) does the compound contain? (d) How many carbons does the compound contain? (e) What is the molecular formula of the compound? (f) What is the structure of the compound? (g) Assign peaks in the moleculeâ€™s 1HNMR spectrum corresponding to specific protons.
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Propyl Bromide