Involvement of the -C(O)-CH=CH- linker chain in different π interactions in crystalline chalcones, (2E)-phenyl-C(=O)-CH=CH-benzene derivatives. Importance of anti-parallel layered motifs in benzyloxy substituted compounds
作者:Ligia R. Gomes、John N Low、James L. Wardell
DOI:10.1016/j.molstruc.2022.134860
日期:2023.4
olefinic bond and near planar chalcone cores, with the interplanar angles between chalcone rings A and B all less than 10°. The phenyl groups in the benzyloxy substituents make much greater interplanar angles with the chalcone core rings, A and B. The linker units, -C(O)-CH=CH-, between the terminal phenyl rings in the chalcone cores, exhibit electronic delocalization as indicated by the bond lengths being
X 射线晶体学、Hirshfeld 表面和 PIXEL 研究报告了五种苄氧基取代化合物,即(E )-3-[2甲氧基-5-苄氧基苯基]-1-(2-羟基-4-甲氧基苯基)-2-烯- 1-一、化合物1、(E )-3-[2,5-双(苄氧基)苯基]-1-(2-羟基苯基)-2-烯-1-一、化合物2、(E )-3- [2,5-双(苄氧基)苯基]-1-(2-羟基-4-甲氧基苯基)-2-烯-1-酮,化合物3,(E )-3-[2,5-双(苄氧基)苯基]-1-(2-羟基-3,4-二甲氧基苯基)-2-烯-1-酮,化合物4,和(E )-3-[2,5-双(苄氧基)苯基]-1-( 2-hydroxy-4,5-dimethoxyphenyl)-2-ene-1-one, compound 5 . 所有五种化合物均具有分子内 O—H (羟基) ···O (羰基)经典氢键,( E)-关于烯键和近平面查尔酮核的排列,查尔酮环A和