作者:L.V. Sudha、D.N. Sathyanarayana
DOI:10.1016/0022-2860(85)87026-5
日期:1985.11
Abstract The 13 C NMR spectra of several 1,3-pyridylmethyl ureas and their corresponding thioureas have been obtained. The 13 C chemical shifts, and the direct and long range 13 C 1 H coupling constants have been deduced. The results indicate an E, Z molecular conformation for 1,3-pyridylmethyl ureas and thioureas which is stabilized by internal NH⋯N (pyridine) hydrogen bonding.
摘要 获得了几种1,3-吡啶基甲基脲及其相应硫脲的13 C NMR谱。推导了 13 C 化学位移,以及直接和长程 13 C 1 H 耦合常数。结果表明 1,3-吡啶基甲基脲和硫脲的 E、Z 分子构象通过内部 NH⋯N(吡啶)氢键稳定。