کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1386236 982482 2005 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Crystal structure and solid-state 13C NMR analysis of N-p-nitrophenyl-α-d-ribopyranosylamine, N-p-nitrophenyl-α-d-xylopyranosylamine, and solid-state 13C NMR analysis of N-p-nitrophenyl-2,3,4-tri-O-acetyl-β-d-lyxopyranosylamine and N-p-nitrophenyl-2,3,4-t
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Crystal structure and solid-state 13C NMR analysis of N-p-nitrophenyl-α-d-ribopyranosylamine, N-p-nitrophenyl-α-d-xylopyranosylamine, and solid-state 13C NMR analysis of N-p-nitrophenyl-2,3,4-tri-O-acetyl-β-d-lyxopyranosylamine and N-p-nitrophenyl-2,3,4-t
چکیده انگلیسی

The X-ray diffraction analysis of N-p-nitrophenyl-α-d-ribopyranosylamine (1) and N-p-nitrophenyl-α-d-xylopyranosylamine (2) was performed. It was found that an independent part of the unit cell of compound 1 is formed by three molecules of sugar whereas the crystals of compound 2 have one molecule in the independent part of the crystal unit cell. Additionally, 1 crystallizes with one molecule of water. The solvent molecule forms an extensive hydrogen bond network with the hydroxyl groups of the sugar, and this efficiently stabilizes the crystal lattice. Contrary to 2, the sugar moieties of 1 adopt the 1C4 conformation. In the spectra of 2, N-p-nitrophenyl-2,3,4-tri-O-acetyl-β-d-lyxopyranosylamine and N-p-nitrophenyl-2,3,4-tri-O-acetyl-α-l-arabinopyranosylamine the number of resonances does not exceed the number of carbon atoms in the molecules, thus indicating no polymorphism. In the spectrum of (1) the signals are split, confirming the presence of three independent molecules in the crystal unit cell.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Research - Volume 340, Issue 17, 12 December 2005, Pages 2645–2653
نویسندگان
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