Aromatic imine stereochemistry as studied by13C and1H NMR of15N-enriched materials
作者:Gerald W. Buchanan、Brian A. Dawson
DOI:10.1002/mrc.1270130416
日期:1980.4
AbstractA series of thirteen 15N‐enriched N‐aryl imines derived from benzaldehydes and acetophenones have been prepared and examined by 13C and 1H NMR. Preferred conformations of the C‐arvl and N‐aryl rings have been deduced from 13C chemical shifts and 13C‐15N couplings. Evidence for steric inhibition of resonance in O‐alkylated materials is presented. Relative signs of 1J(CN) and 2J(CCN) have been determined in some compounds. An E: Z interconversion barrier of 21.6 kcal mol−1 has been obtained from 1H NMR coalescence data.