9. (a) Substitution of an amino group at the para-position of autophenone shifts the C=0 frequency from 1685 cm¯ to 1652 cm-; whereas nitrogroup a attached at that position yields the C=0 frequency to appear at 1693 cm-'. Explain the shifts. (b) Why does a ß-diketone appear as two 1640 cm--1580 cm -1 broadbands at and at 3100 cm¬1-2700 cm¬l? (c) Discuss the effect of ring strain on the crabonyl stretching for cyclic ketones.
9. (a) Substitution of an amino group at the para-position of autophenone shifts the C=0 frequency from 1685 cm¯ to 1652 cm-; whereas nitrogroup a attached at that position yields the C=0 frequency to appear at 1693 cm-'. Explain the shifts. (b) Why does a ß-diketone appear as two 1640 cm--1580 cm -1 broadbands at and at 3100 cm¬1-2700 cm¬l? (c) Discuss the effect of ring strain on the crabonyl stretching for cyclic ketones.
Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter3: Stereoisomerism And Chirality
Section3.8: The Significance Of Chirality In The Biological World
Problem CQ: The amino acids cysteine and serine are shown. What are the Cahn-Ingold-Prelog stereochemical...
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