Resonance assisted hydrogen bonds between oxime and carboxyl group. The comparison of tetrameric structures of 4-methyl-2-oxopentanoic acid oxime and levulinic acid oxime
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چکیده
منابع مشابه
(E)-4-Nitrobenzaldehyde oxime
In the title compound, C(7)H(6)N(2)O(3), the planes containing the CNO and ONO atoms subtend dihedral angles of 5.47 (5) and 8.31 (5)°, respectively, with the benzene ring. In the crystal structure, inter-molecular O-H⋯N hydrogen bonds link the mol-ecules into centrosymmetric dimers with an R(2) (2)(6) graph-set motif.
متن کامل(E)-2-Bromobenzaldehyde oxime
The configuration of the C=N double bond of the title compound, C(7)H(6)BrNO, is E; the non-H atoms are approximately coplanar (r.m.s. deviation = 0.038 Å). In the crystal, pairs of mol-ecules are linked by a pair of O-H⋯N hydrogen bonds about a center of inversion, generating hydrogen-bonded dimers.
متن کامل(E)-4-Phenylbutan-2-one oxime
In the title compound, C(10)H(13)NO, the C-C-C-C torsion angle formed between the benzene ring and the butan-2-one oxime unit is 73.7 (2)°, with the latter lying above the plane through the benzene ring. In the crystal, inter-molecular O-H⋯N hydrogen bonds link pairs of mol-ecules into dimers, forming R(2) (2)(6) ring motifs which are stacked along the a axis.
متن کاملBenzamide oxime
In the crystal structure of the title compound, C(7)H(8)N(2)O, mol-ecules are connected via inter-molecular N-H⋯O and O-H⋯N hydrogen bonds to form a two-dimensional supra-molecular structure. The oxime group has an E configuration and the dihedral angle between the mean planes of the benzene ring and the amidoxime grouping is 20.2 (3)°.
متن کاملDFT study of hydrogen-bonded dimers and tetramer of glyoxilic acid oxime
DFT study of hydrogen-bonded dimers and tetramer of glyoxilic acid oxime (GAO) has been performed at B3LYP/ 6-31G* and B3LYP/6-31++G** levels of the theory. The N HAO and O HAO hydrogen bondings in the selfassembling structures studied have been estimated from intermolecular distances, enthalpy of stabilization, hydrogenbonding energies and AIM electron density at the hydrogen bond critical poi...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations of Crystallography
سال: 1993
ISSN: 0108-7673
DOI: 10.1107/s0108767378094994