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metal-organic compounds
The crystal structure of the title compound, (1,4,7,10,13,16-hexaoxacyclooctadecane-κ6O)potassium chlorochromate(VI), [K(C12H24O6)][CrClO3], contains a K+ cation, complexed with one crown ether molecule, and a chlorochromate anion. The cation is located within the mean plane of the ether O atoms, approximately in the centre of the macrocyclic cavity, and bonded to them with K—O distances in the range 2.785 (5)–2.836 (5) Å. In the crystal structure, polymeric chains of the type K+–CrO
–K+ are formed.
–K+ are formed.organic compounds
In the crystal structure of the title compound, C18H17N3O2, the imidazoline ring has a very flattened envelope conformation, with a twisted endocyclic C=N double bond.
organic compounds
An X-ray diffraction study of the title compound, C13H15NO4, has demonstrated that the formation of intramolecular O—H
O=C hydrogen bonds leads to the lengthening of the carbonyl C=O bonds, shortening of the (C=)C—O(—H) bond and delocalization of the electron density within the dihydropyridine ring.
O=C hydrogen bonds leads to the lengthening of the carbonyl C=O bonds, shortening of the (C=)C—O(—H) bond and delocalization of the electron density within the dihydropyridine ring.metal-organic compounds
The title compound, (6,7,9,10,12,13,15,16-octahydrodibenzo[b,e]-1,4,7,10,13,16-hexaoxacyclooctadecine)potassium chlorochromate, [K(C20H24O6)][CrClO3], is the complex formed by a K+ cation with one crown ether molecule and a chlorochromate anion. The cation is displaced from the mean plane of the ether O atoms by 0.849 (2) Å towards the anion. It forms coordination bonds with all of the O atoms of the crown ether, as well as with the disordered O and Cl atoms of the anion.
organic compounds
The title compound, C14H13NO5, exhibits a resonance-assisted hydrogen bond O—HO=C [2.505 (4) Å], which leads to a lengthening of the carbonyl C=O bond, a shortening of the C—OH bond and delocalization of the electron density within the dihydropyridine ring.
O=C [2.505 (4) Å], which leads to a lengthening of the carbonyl C=O bond, a shortening of the C—OH bond and delocalization of the electron density within the dihydropyridine ring.
