9. The variation with temperature of the H chemical shifts of [18]annulene in solution is as shown below. Comment as fully as possible on this behaviour and on the linewidths in the temperature ranges -60 °C to +20 °C and +70 °C to 110 °C. (From 1990 Advanced Paper.)
9. The variation with temperature of the H chemical shifts of [18]annulene in solution is as shown below. Comment as fully as possible on this behaviour and on the linewidths in the temperature ranges -60 °C to +20 °C and +70 °C to 110 °C. (From 1990 Advanced Paper.)
Chemistry for Engineering Students
3rd Edition
ISBN:9781285199023
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter5: Gases
Section: Chapter Questions
Problem 5.23PAE
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not sure exactly what is causing the peak to converge at high temperature. I'm guessing that for digmagnetic moment to be induced the plane must be perpendicular to the appled magnetic field but at high temperature the annulene rotate too fast that the plane can never really perpendicular to the applied magnetic field?
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