The CON−H…+NH2 Blue-Shifting H-Bond Stabilizing Effect on Z Secondary Amides and Cyclic System Conformational Rearrangement through an Alkylamine-Chain Migration Pathway

<div>1H- and 13C-NMR spectra for conformational isomers 5-6. Rearranged product 5 contains no CON−H…NHCH3 links. The integration curve provides two CH2CH2CH2 protons, they occur as a quintet absorption downfield relative to unrearranged 6; also the π electrons of the C=O bond deshield the lateral zones in which the CH2NHCH3 protons are located.</div>

Journal of Chemistry

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Figure 1

Figure 1: The CON−H…+NH2 Blue-Shifting H-Bond Stabilizing Effect on Z Secondary Amides and Cyclic System Conformational Rearrangement through an Alkylamine-Chain Migration Pathway

Figure 1 | The CON−H…+NH2 Blue-Shifting H-Bond Stabilizing Effect on Z Secondary Amides and Cyclic System Conformational Rearrangement through an Alkylamine-Chain Migration Pathway 