Effect of Through-Bond Interaction on Conformation and Structure in Rod-Shaped Donor–Acceptor Systems. Part 1
作者:Dirk J. A. De Ridder、Kees Goubitz、Henk Schenk、Bert Krijnen、Jan W. Verhoeven
DOI:10.1002/hlca.200390081
日期:2003.3
The crystal structures of five N-arylpiperidin-4-one derivatives 2P2, 3P2, 5P2, 1P3, and 2P3 are presented (Fig. 2 and Tables 1–5) and discussed together with the derivatives 1P2 and 4P2 published previously. In all but one structure, 1P2, the aryl group is in an equatorial position. The piperidine ring adopts a normal chair conformation. In 1P2, the piperidine ring central CC bonds are significantly
五个晶体结构Ñ -arylpiperidin -4-酮衍生物2P2,3P2,5P2,1P3和2P3呈现(图2和表1-5中),并与衍生物一起讨论1P2和4P2先前公布。在除一个结构1P2之外的所有结构中,芳基均位于赤道位置。哌啶环采用正常的椅子构象。在1P2中,哌啶环的中心CC键显着延长,这与通过键相互作用在轴向构象中更明显的想法是一致的。贯穿键的相互作用还影响哌啶C(4)原子的锥体化反应,使得强相互作用将乙烯C原子C(9)引入轴向。