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organic compounds
The analysis of the title compound, C14H21NO6, revealed a highly distorted conformation of the six-membered pyranose ring. The presence of two five-membered 1,3-dioxolane rings fused to the pyranose ring at the 1,2- and 3,4-positions is responsible for the severe deviation from the usual chair conformation of the pyranose ring. The three-dimensional packing is stabilized by weak hydrogen bonds of the C—H
O type.
O type.organic compounds
In the title compound, C20H26O8, the molecules adopt a conformation in which the torsion angle C(aryl)—C—C—O(aryloxy) is −70.8 (2)° and the torsion angle C(aryl)—O—C—C(benzylic) is −152.71 (18)°, leading to a C(aryl)C(aryl) distance of 4.426 (3) Å. This distance is identical, within experimental error, to the calculated maximum value obtained when the torsion angle C(aryl)—O—C—C(benzylic) is varied and the torsion angle C(aryl)—C—C—O(aryloxy) is kept constant. The angle between the aromatic ring planes is 64.13 (7)°. The conformation is compared with those of related lignin model compounds. The hydrogen-bonding pattern reveals intramolecular interactions, and the formation of centrosymmetric dimers and chains of molecules by intermolecular interactions.
C(aryl) distance of 4.426 (3) Å. This distance is identical, within experimental error, to the calculated maximum value obtained when the torsion angle C(aryl)—O—C—C(benzylic) is varied and the torsion angle C(aryl)—C—C—O(aryloxy) is kept constant. The angle between the aromatic ring planes is 64.13 (7)°. The conformation is compared with those of related lignin model compounds. The hydrogen-bonding pattern reveals intramolecular interactions, and the formation of centrosymmetric dimers and chains of molecules by intermolecular interactions.metal-organic compounds
The title compound, tetrasodium bis[tris(salicylatotitanate(IV)] undecahydrate, Na4[Ti(C7H4O3)3]2·11H2O, crystallizes with two titanium salicylate complex ions, four sodium ions and 11 water molecules in the asymmetric unit. One water O atom is disordered over two positions, having 0.74 (5) and 0.26 (5) occupancy. Both Ti atoms and three sodium ions adopt a distorted octahedral coordination by O atoms. The fourth sodium ion has a distorted trigonal-bipyramidal coordination by oxygen, sharing one edge with a sodium coordination octahedron.
organic compounds
In the structure of the title compound, C16H20O7, the five-membered 1,3-dioxolane ring is disordered with two different positions, A and B (1/1); it adopts the OT4 conformation slightly distorted towards E4 for molecule A, and the 1E conformation distorted towards 1TO for molecule B. The pyranose ring adopts an almost ideal 1C4 conformation. The three-dimensional packing is stabilized by strong intermolecular O—HO interactions and weak C—HO hydrogen bonds.
O interactions and weak C—HO hydrogen bonds.organic compounds
The title compound, C12H13N4+·C7H7O3S-, contains an imidazolium cation and a toluene-p-sulfonate anion in the asymmetric unit. Hydrogen-bonded dimers are formed between the cyano and amino groups of inversion-related imidazolium cations.
