The chemical shifts of the methyl groups of three related molecules,pinnae, a-pinane, and B-pinene, follow. CH...

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The chemical shifts of the methyl groups of three related molecules,pinnae, a-pinane, and B-pinene, follow. CH CH, CH CH3 CH3 CH 1.27 ppm CH CH3 CH2 1.23 1.17 1.63 0.99 Ppm Ppm ppm ppm 0.72 ppm 1.01 ppm 0.85 ppm B-Pinene Pinane a-Pinene Build models of these three compounds, and then explain why the two circled methyl groups have such small chemical shifts. The chemical shifts of the methyl groups of three related molecules,pinnae, a-pinane, and B-pinene, follow. CH CH, CH CH3 CH3 CH 1.27 ppm CH CH3 CH2 1.23 1.17 1.63 0.99 Ppm Ppm ppm ppm 0.72 ppm 1.01 ppm 0.85 ppm B-Pinene Pinane a-Pinene Build models of these three compounds, and then explain why the two circled methyl groups have such small chemical shifts.

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The circled methyl groups in the pinene molecules are close to the double bond and along its length ... View the full answer