کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1389583 982897 2005 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
X-ray structure of the dipotassium salt of d-mannose 1-phosphate 3.25 hydrate
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
X-ray structure of the dipotassium salt of d-mannose 1-phosphate 3.25 hydrate
چکیده انگلیسی
The first crystal structure of mannose 1-phosphate is described. The dipotassium hydrate salt crystallizes in the P21212 space group. There are two independent dianions (I and II) in the asymmetric unit, which are α anomers adopting the 4C1 chair conformation. The main difference between the two mannose 1-phosphate dianions is the orientation of the phosphate group with relation to the pyranosyl ring. In I, one of the phosphate oxygen atoms is antiperiplanar positions with respect to carbon atom C-1, whereas the two others are situated synclinally. The corresponding orientations of the terminal phosphate oxygen atoms in II are synperiplanar and anticlinal. The potassium cations are six- and seven-coordinate, mainly with O atoms of hydroxyl groups and water molecules. There are potassium channels extending along the c-axis. In the packing arrangement, water molecules and mannose phosphate groups also define two different types of layers parallel to a-axis. Within water channels there are extensive hydrogen-bonding networks.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Research - Volume 340, Issue 15, 31 October 2005, Pages 2422-2427
نویسندگان
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