Hirshfeld surface analyses and crystal structures of supramolecular self-assembly thiourea derivatives directed by non-covalent interactions

摘要

The novel N-(bis(3,5-dimethoxybenzyl)carbamothioyl)-4-R-benzamide (R: H, Cl, CH3 and OCH3) compounds have been synthesized and characterized by FT-IR, H-1 NMR and C-13 NMR spectroscopy. Their crystal structures were also determined by single-crystal X-ray diffraction studies. Hirshfeld surfaces analysis and their associated two dimensional fingerprint plots of compounds were used as theoretical approach to assess driving force for crystal structure formation via the intermolecular interactions in the crystal lattices of synthesized compounds. The study of X-ray single crystal diffraction and Hirshfeld surfaces analysis of the prepared compounds shows that hydrogen bonding and other weaker interactions such as N-H center dot center dot center dot S, weak C-H center dot center dot center dot S, C-H center dot center dot center dot O, C-H center dot center dot center dot N and C-H center dot center dot center dot pi intermolecular interactions and pi-pi stacking, among molecules of synthesized compounds participate in a cooperative way to stabilize the supramolecular structures. (C) 2017 Elsevier B.V. All rights reserved.