4. Label the PROTONS on the structures on this page, using letters to designate the chemically equivalent ones. For this question, remember that some protons will likely be diastereotopic. Use a letter and the same letter with a prime (') to denote protons that are diastereotopic when labeling the structures. Then, fill in the prediction table for each molecule with information pertaining to the integral (e.g. 1H, 3H, etc.), multiplicity (e.g. s, d, dt, ddd, etc.), and approximate chemical shift (e.g. 0-2 ppm, -4 ppm, etc.). Remember that you can get complex splitting when there are different types of neighbors. There may be more rows than you will need. NOTE: Diastereotopic protons on the same carbon are considered "neighbors." Н. OH H Label Integral Multiplicity Approx. Chem Shift 3H 0-2 ppm A d H Label Integral Multiplicity Approx. Chem Shift

4. Label the PROTONS on the structures on this page, using letters to designate the chemically equivalent ones. For this question, remember that some protons will likely be diastereotopic. Use a letter and the same letter with a prime (') to denote protons that are diastereotopic when labeling the structures. Then, fill in the prediction table for each molecule with information pertaining to the integral (e.g. 1H, 3H, etc.), multiplicity (e.g. s, d, dt, ddd, etc.), and approximate chemical shift (e.g. 0-2 ppm, -4 ppm, etc.). Remember that you can get complex splitting when there are different types of neighbors. There may be more rows than you will need. NOTE: Diastereotopic protons on the same carbon are considered "neighbors." Н. OH H Label Integral Multiplicity Approx. Chem Shift 3H 0-2 ppm A d H Label Integral Multiplicity Approx. Chem Shift

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter13: Structure Determination: Nuclear Magnetic Resonance Spectroscopy

Section13.SE: Something Extra

Problem 56GP: Long-range coupling between protons more than two carbon atoms apart is sometimes observed when ...

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Can you explain spectroscopy? Let's start with NMR Spectroscopy. What is the difference between a proton being enantiotopic and homotopic? What does it mean for a proton to be shielded or deshielded? How do you determine J (the coupling constant)? What does 'coupling is mutual' mean? How is that translated on the NMS Spectroscopy spectrum? Does that have to do with the polarity of the molecule? Is there an easier way to explain that? When thinking about C-13 NRM Spectroscopy, what it meant by the statement, "the carbons cannot integrate"? When looking at an NMR Spectroscopy spectrum, how do you know which peak belongs to which proton? (The intensity of the peak and the ppm of the peak) P.S. These questions come from after watching a lecture. There is no graded assignment attached to these questions. I simply do not understand the material.
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Chemistry
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