Results 211 to 220 of about 184,100 (261)
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Acta Crystallographica Section C Crystal Structure Communications, 1997
The title compound, C15H10O2, was found to crystallize in the centrosymmetric space group P2(1)/n. The hydrogen bonding is of the cyclic dimer type about a center of symmetry. The carboxyl O atoms are ordered as is the carboxyl H atom. The anthracene core, while less nearly planar, shows good agreement with the anthracene cores of anthracene-9 ...
L J, Fitzgerald, R E, Gerkin
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The title compound, C15H10O2, was found to crystallize in the centrosymmetric space group P2(1)/n. The hydrogen bonding is of the cyclic dimer type about a center of symmetry. The carboxyl O atoms are ordered as is the carboxyl H atom. The anthracene core, while less nearly planar, shows good agreement with the anthracene cores of anthracene-9 ...
L J, Fitzgerald, R E, Gerkin
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Phenanthrene-9-carboxylic Acid
Acta Crystallographica Section C Crystal Structure Communications, 1997The title compound, C15H10O2, crystallized in the centrosymmetric space group C2/c. Hydrogen bonding is of the cyclic dimer type about a center of symmetry. The carboxyl H and O atoms are ordered. The phenanthrene core is almost planar and the dihedral angle between the core plane and the carboxyl group plane is only 1.8(1) degrees. The bay H atoms, H4
L J, Fitzgerald, R E, Gerkin
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Acta Crystallographica Section C Crystal Structure Communications, 1996
In xanthene-9-carboxylic acid, C14H10O3, hydrogen bonding is of the cyclic dimer type but involves two crystallographically inequivalent molecules and does not occur about a center of symmetry. The carboxylic H atoms are ordered. The dihedral angle (fold angle) of the xanthene core is 14.2 (1) degree for molecule A and 11.3 (2) degrees for molecule B ...
A C, Blackburn, A J, Dobson, R E, Gerkin
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In xanthene-9-carboxylic acid, C14H10O3, hydrogen bonding is of the cyclic dimer type but involves two crystallographically inequivalent molecules and does not occur about a center of symmetry. The carboxylic H atoms are ordered. The dihedral angle (fold angle) of the xanthene core is 14.2 (1) degree for molecule A and 11.3 (2) degrees for molecule B ...
A C, Blackburn, A J, Dobson, R E, Gerkin
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Directing carboxylic acid dehydrogenation
Science, 2021A palladium ligand can activate carbon-hydrogen bonds yet avoid product olefin ...
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Phenanthrene-4-carboxylic Acid and 1,2-Dihydrophenanthrene-4-carboxylic Acid
Acta Crystallographica Section C Crystal Structure Communications, 1998Phenanthrene-4-carboxylic acid, C15H10O2, crystallized in the centrosymmetric space group P2(1)/n, while 1,2-dihydrophenanthrene-4-carboxylic acid, C15H12O2, crystallized in the centrosymmetric space group Pbca. In each structure, there is a single type of hydrogen bond: it is of the cyclic dimer type about a center of symmetry.
L J, Fitzgerald, R E, Gerkin
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2,6-Diphenylpyridine-4-carboxylic acid
Acta Crystallographica Section C Crystal Structure Communications, 2001The distinctive feature of the crystal structure of 2,6-diphenylpyridine-4-carboxylic acid, C18H13NO2, is the formation of intermolecular O-H...O hydrogen bonds that lead to the formation of centrosymmetric cyclic dimers with R2(2)(8) topology. Molecules related by translation along the b axis exhibit strong pi-pi stacking of aromatic rings, with an ...
CRISPINI, Alessandra, NEVE, Francesco
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From Carboxylic Acids and Carboxylic Acid Esters
2005K. Ostrowska, A. Kolasa
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