Molecular structures of five adducts assembled from p-dimethylaminobenzaldehyde and organic acids

作者：Jin, Shouwen^*; Wang, Lanqing; Liu, Hui; Liu, Li; Zhang, Huan; Wang, Daqi; Li, Minghui; Guo, Jianzhong; Guo, Ming

来源：Journal of Molecular Structure, 2016, 1116: 155-164.

DOI：10.1016/j.molstruc.2016.03.027

• Crystal structures
• Hydrogen bonds
• Organic acids
• p-dimethylaminobenzaldehyde

Five adducts 1-5 derived from p-dimethylaminobenzaldehyde have been prepared and characterized by X-ray diffraction analysis, IR, mp, and elemental analysis. Of the five adducts two are organic salts (1, and 2) and the other three (3-5) are cocrystals. In salts 1, and 2, the L molecules are protonated. @@@ The supramolecular architectures of the adducts 1-5 involve extensive intermolecular NH center dot center dot center dot O, O-H center dot center dot center dot O, O-H center dot center dot center dot S, and C-H center dot center dot center dot O hydrogen bonds as well as other non-covalent interactions. The role of weak and strong non-covalent interactions in the crystal packing is ascertained. The complexes displayed 2D/3D framework structure for the synergistic effect of the various non-covalent interactions. @@@ The results presented herein tell that the strength and directionality of the N-H center dot center dot center dot O, O-H center dot center dot center dot O, and O-H center dot center dot center dot S hydrogen bonds between organic acids and p-dimethylaminobenzaldehyde are sufficient to bring about the formation of binary cocrystals or organic salts.

• 出版日期2016-7-15
• 单位聊城大学; 浙江农林大学