related N-alkyl-N,N′-diacylhydrazines are environmentally benign insect growth regulators. Herein, we show that an unusual nN(amide) → π*Ar interaction mediated by a hydrazide amide nitrogen atom plays a crucial role in stabilizing their biologically active trans–cis (t–c) rotameric conformations. We provide NMR and IR spectroscopic evidence for the presence of these interactions, which is also supported
1,2-二苯甲酰基-1-叔丁基
肼 (RH-5849) 和相关的N-烷基-N , N '-二酰基
肼是对环境无害的昆虫生长调节剂。在此,我们表明由酰
肼酰胺氮原子介导的不寻常的 n N (酰胺) → π* Ar相互作用在稳定其
生物活性反式-顺式 (t-c) 旋转异构构象方面起着至关重要的作用。我们为这些相互作用的存在提供了 NMR 和 IR 光谱证据,这也得到了 X 射线晶体学和计算研究的支持。