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Author Question: Why is the expected stretching absorption of the C=O bond 1685 cm-1 for the structure I and 1715 ... (Read 18 times)

bubba123

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on: Feb 17, 2022
Why is the expected stretching absorption of the C=O bond 1685 cm-1 for the structure I and 1715 cm-1 for structure II?



◦ Compound I lacks conjugation, which is present in compound II.
◦ The expected stretching absorption is lowered in all molecules with cyclohexane rings.
◦ Having fewer double bonds results in lowering of all of the stretching absorptions.
◦ The C to O double bond of compound I has greater single bond character than the C to O double bond of compound II.
◦ Compound II has a C to O double bond with considerable single bond character, lowering the expected stretching absorption.
Organic Chemistry ¦ Klein ¦ 4th Edition
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Marked as best answer by bubba123 on Feb 17, 2022

RodrickHac

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Reply #1 on: Feb 17, 2022
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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bubba123

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Reply 2 on: Feb 17, 2022
Wow, this really help

bbburns21

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Reply 3 on: Yesterday
Excellent

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