N.m.r. and i.r. spectra are reported for 19 imines of the type PC[graphic omitted]N–C[graphic omitted]QR (P = alkyl or aryl and Q, R =(H,alk), (alk,alk), or –[CH2]n–). The variation in |Jab| with structure is examined, and evidence is found for conformational effects similar to those for allylic coupling. The CN stretching frequencies fall into characteristic and separate ranges for P = alkyl and P
报告了19种
亚胺PC [Graphic] N–C [Graphic] QR(P =烷基或芳基和Q,R =(H,alk),(alk,alk)或– [CH 2 ] n –)。|中的变化 J ab | 研究了具有结构的结构,并发现了构象效应与烯丙基偶联相似的证据。对于P =烷基和P =芳基,C N的拉伸频率落入特征和单独的范围,但是较好的效果通常并不明显。