The carbonyl stretching frequency in the infrared spectrum of each of the follow

Started by Umar, May 27, 2010, 10:21:25 AM

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uma

Higher the conjugation effect lower is the frequency of C=O stretch
Here in i conjugation is due to lone pairs on N and in ii no conjugation and in iii two N atoms are responsible for conjugation
conjugation is increasing in this order
ii < i< iii
hence frequency will decrease in this order

ii > i> iii

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