X-ray crystallographic study of α-brominated diketo teraquinanes. Conformational effects of the number of halogens and their position on bond length and solit-state conformation
作者:Leo A. Paquette、Bruce M. Branan、Robin D. Rogers
DOI:10.1016/s0040-4020(01)88141-2
日期:——
to the monobromo, 1,4- and 1,6-dibromo, 1,4,6- tribromo, and 1,4,6,9-tetrabromo derivatives. X-ray structural analysis of the latter four compounds has shown bond lengths and bond angles not to be greatly affected by the number of bromine atoms or their relative position. On the other hand, conformational preferences are seen to vary appreciably with substitution pattern across the series.
四环[7.2.10 4,11 0 6,10 ]十二烷-5,12-二酮用溴化铜(II)或分子溴的卤代取代为一溴,1,4-和1,6-二溴提供了合成入口,1,4,6-三溴和1,4,6,9-四溴衍生物。后四种化合物的X射线结构分析表明,键长和键角不受溴原子数或它们的相对位置的影响很大。另一方面,构象偏好随整个系列中的替换模式而明显变化。