Crystal structure of 4-amino-4-deoxy-5,6-O-isopropylidene-D-gulitol, C9H19NO5
نویسندگان
چکیده
منابع مشابه
Crystal Structure of Methyl 4-amino-4-cyano-4,6-dideoxy-2,3- O-isopropylidene-α-L-talopyranoside
The structure of methyl 4-amino-4-cyano-4,6-dideoxy-2,3-O-isopropylidene-α-Ltalopyranoside was established by X-ray analysis confirming a talo configuration at C-4 and suggesting a C4 conformation of the pyranose ring. The values of relevant torsion angles and calculated puckering parameters revealed a distortion into the direction of E conformation, thus indicating a flattening at C-2.
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The title compound, C6H5Cl2NO, has a single planar mol-ecule in the asymmetric unit with the non-H atoms possessing a mean deviation from planarity of 0.020 Å. In the crystal, O-H⋯N hydrogen bonds lead to the formation of infinite chains along [101] which are further linked by N-H⋯O hydrogen bonds, forming (010) sheets.
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The title compound, C12H20N4O5, crystallizes in the monoclinic space group P21, with four crystallographically independent mol-ecules in the asymmetric unit. The four mol-ecules have a very similar conformation that is basically determined by the formation of two intra-molecular hydrogen bonds between the amino NH2 donors and the carbonyl and ring O-atom acceptors, forming, respectively, R(6) a...
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متن کاملCrystal structure of 4-[(E)-(4-nitrobenzylidene)amino]phenol
The asymmetric unit of the title compound, C13H10N2O3, contains four independent mol-ecules (I, II, III and IV). Mol-ecule IV shows whole-mol-ecule disorder over two sets of adjacent sites in a 0.669 (10):0.331 (10) ratio. The dihedral angles between the aromatic rings are 32.30 (13)° in mol-ecule I, 2.24 (14)° in II, 41.61 (13)° in III, 5.0 (5)° in IV (major component) and 10.2 (3)° in IV (min...
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ژورنال
عنوان ژورنال: Zeitschrift für Kristallographie - New Crystal Structures
سال: 1997
ISSN: 2197-4578,1433-7266
DOI: 10.1524/ncrs.1997.212.1.215