[Sergey]

Hi guys! Does anybody know why in DEPT NMR experiment -CH=N- group is not found among -CH- carbons signals? The aldehyde RCHO group does. The -CH=N- group mentioned above appears around 165 ppm in 13C NMR, that is normal for a carbonyl but does not happen to be recognized as CH in DEPT. Also looks like it does not coupled to hydrogens like in RCH2CH=N- while again in case of carbonyls we have the opposite. I tried to find an explanation, but did not have a chance to get anything worthwhile.