کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1401994 | 1501729 | 2015 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Solid state structure of new 5-[2-(N,N-diethylamino)ethoxy]-4,7-dimethylcoumarins by X-ray and 13C CP/MAS NMR Solid state structure of new 5-[2-(N,N-diethylamino)ethoxy]-4,7-dimethylcoumarins by X-ray and 13C CP/MAS NMR](/preview/png/1401994.png)
• We report microwave-assisted synthesis of new hydroxycoumarin derivatives.
• The structures of new compounds were studied with X-ray diffraction technique.
• The solid state structure was analyzed using the fully resolved 13C CP/MAS.
5-[2-(N,N-diethylamino)ethoxy]-4,7-dimethylcoumarin (1) and 6-acetyl-5-[2-(N,N-diethylamino)ethoxy]-4,7-dimethylcoumarin (2) were synthesized in a traditional way and microwave-assisted synthesis. Crystals of 2 in form of hydrochloride salt (3) were investigated using single crystal X-ray diffraction technique. In the crystal lattice of 3 there is only one type of strong hydrogen bond present involving protonated amino group and chloride anion. The whole structure is dominated by weak C–H…Cl−, C–H…O contacts. There is also visible aggregation of cations in stacks due to π–π interactions. The solid state structures of 1 and 2 derived from 13C CP/MAS NMR spectra were also proposed.
Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Structure - Volume 1088, 15 May 2015, Pages 123–128