Balancing Conjugational Stabilization and Torsional Strain. The Solid-State Structure of a 2-Thioalkyl-Substituted Pyridine N-Oxide
作者:J. Hartung、I. Svoboda、H. Fuess
DOI:10.1107/s0108270196007019
日期:1996.11.15
The solid-state geometry of 2-(1-phenyl-4-penten-1-yl-thio)pyridine N-oxide, C16H17NOS, provides an insight into the spatial arrangement of the 2-thioalkyl side chain. The N2-C7-S8 bond angle [112.0(2)degrees] shows a significant and unprecedented distortion from the expected value of 120 degrees towards the pyridine N-oxide O atom. The substituents of the thioether are arranged to allow conjugational interaction of the lone pairs on sulfur and the heteroaromatic nucleus on one side, and a minimization of conformational strain between the pyridyl and the alkenyl groups on the other side.