Synthesis and structure of longitudinally twisted polycyclic aromatic hydrocarbons
作者:Robert A. Pascal、William D. McMillan、Donna Van Engen、Robert Gregory Eason
DOI:10.1021/ja00249a032
日期:1987.7
The syntheses of 9,18-diphenyl, 9,18-bis(4-chlorophenyl)-, 9,18-bis(4-(trifluoromethyl)phenyl)-, and 9,18-bis(4-isopropylphenyl)tetrabenz(a,c,hj)anthracene as well as 9,18-diphenyltetrabenz(de,jk,op,uv)pentacene are described. X-ray crystallographic analyses of the first three compounds show them to be highly distorted from planarity, with the end-to-end twists of the anthracene moieties ranging from
9,18-二苯基、9,18-双(4-氯苯基)-、9,18-双(4-(三氟甲基)苯基)-和9,18-双(4-异丙基苯基)四苯(a)的合成,c,hj) 蒽以及 9,18-二苯基四苯 (de,jk,op,uv) 并五苯被描述。前三种化合物的 X 射线晶体学分析表明它们因平面性而高度扭曲,蒽部分的端到端扭曲范围从 60.8/sup 0/ 到 69.7/sup 0/。使用双(异丙基苯基)衍生物的变温 NMR 实验表明,扭转反转的障碍约为 16.7 kcal/mol。