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Aromatics • Due to the delocalization of electrons in the ring, where the bond order between carbons is 1 %, the stretching frequency for these bonds is slightly lower in energy than normal C=C • These bonds show up as a pair of sharp bands, 1500 (s) & 1600 cm-1 (m), where the lower frequency band is stronger • •C-H bonds off the ring show up similar.to vinyl C-H at 3000- 3100 cm-1 (m)

Aromatics • Due to the delocalization of electrons in the ring, where the bond order between carbons is 1 %, the stretching frequency for these bonds is slightly lower in energy than normal C=C • These bonds show up as a pair of sharp bands, 1500 (s) & 1600 cm-1 (m), where the lower frequency band is stronger • •C-H bonds off the ring show up similar.to vinyl C-H at 3000- 3100 cm-1 (m)

Chemistry
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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Aromatics • Due to the delocalization of electrons in the ring, where the bond order between carbons is 1 ½, the stretching frequency for these bonds is slightly lower in energy than normal C=C • These bonds show up as a pair of sharp bands, 1500 (s) & 1600 cm-1 (m), where the lower frequency band is stronger • • C-H bonds off the ring show up similar to vinyl C-H at 3000- 3100 cm-1 (m) CS Scanned with CamScanner
Transcribed Image Text:Aromatics • Due to the delocalization of electrons in the ring, where the bond order between carbons is 1 ½, the stretching frequency for these bonds is slightly lower in energy than normal C=C • These bonds show up as a pair of sharp bands, 1500 (s) & 1600 cm-1 (m), where the lower frequency band is stronger • • C-H bonds off the ring show up similar to vinyl C-H at 3000- 3100 cm-1 (m) CS Scanned with CamScanner
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