Weak interactions direct crystal packings of arylated 1,3-butadienes
摘要:
Four novel aryl butadienes (substituted with R = Cl, OCH3, NO2 and H) were prepared and characterised by X-ray diffraction, IR, UV/Vis and NMR spectroscopies. A comparative analysis of crystal packings was aimed to determining influence of weak interactions: C-H center dot center dot center dot O and C-H center dot center dot center dot Cl hydrogen bonds, C-H center dot center dot center dot pi interactions and dispersion interactions. Since no proton donors is present and since the molecules are sterically very similar, these weak interactions are responsible for wide variation in 3D packing and supramolecular motives. (C) 2014 Elsevier B.V. All rights reserved.