**Predict the ¹H NMR Chemical Shift of the Circled Proton(s) in the Structure Below** ### Structure: The molecular structure displayed consists of a carbon chain with the following components: - A central carbon (C) double-bonded to an oxygen (O). - A methyl group (CH₃) is bonded to the first carbon. - The second carbon is bonded to a CH₂ group, which is circled and connected to a carbon bonded to another CH₃ group. ### Question: Predict the ¹H NMR chemical shift for the circled CH₂ protons. ### Answer Options: A) 0.5-1.2 ppm B) 2.0-2.2 ppm C) 2.5-4.0 ppm D) 4.0-5.5 ppm E) 8-10 ppm ### Explanation: - The circled CH₂ group, adjacent to the carbonyl group, is involved in this shift prediction task. The proximity to the electronegative oxygen in the carbonyl group affects the shift value, typically deshielding the protons in the CH₂.

Predict the ¹H NMR Chemical Shift of the Circled Proton(s) in the Structure Below ### Structure: The molecular structure displayed consists of a carbon chain with the following components: - A central carbon (C) double-bonded to an oxygen (O). - A methyl group (CH₃) is bonded to the first carbon. - The second carbon is bonded to a CH₂ group, which is circled and connected to a carbon bonded to another CH₃ group. ### Question: Predict the ¹H NMR chemical shift for the circled CH₂ protons. ### Answer Options: A) 0.5-1.2 ppm B) 2.0-2.2 ppm C) 2.5-4.0 ppm D) 4.0-5.5 ppm E) 8-10 ppm ### Explanation: - The circled CH₂ group, adjacent to the carbonyl group, is involved in this shift prediction task. The proximity to the electronegative oxygen in the carbonyl group affects the shift value, typically deshielding the protons in the CH₂.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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