(E)-4-[(4-Diethylamino-2-hydroxybenzylidene)amino]benzoic acid
نویسندگان
چکیده
In the title compound, C(18)H(20)N(2)O(3), a potential bidentate N,O-donor Schiff base ligand, the benzene rings are inclined at an angle of 12.25 (19)°. The mol-ecule has an E conformation about the C=N bond. One of the ethyl groups is disordered over two positions, with a refined site-occupancy ratio of 0.55 (1):0.45 (1). An intra-molecular O-H⋯N hydrogen bond makes an S(6) ring motif. In the crystal, pairs of O-H⋯O hydrogen bonds link mol-ecules, forming inversion dimers with R(2) (2)(8) ring motifs.
منابع مشابه
2-[(E)-4-Diethylamino-2-hydroxybenzylidene]hydrazinecarboxamide
Two mol-ecules make up the asymmetric unit of the title compound, C(12)H(18)N(4)O(2), and both feature an intra-molecular O-H⋯N hydrogen bond, which generates an S(6) ring. The diethyl-amino group of one of the mol-ecules is disordered over two sets of sites in a 0.59 (2):0.41 (2) ratio. In the crystal, N-H⋯O hydrogen bonds link the mol-ecules into sheets lying parallel to the ac plane and C-H⋯...
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The mol-ecular structure of the title compound, C20H18N2O5S·C3H7NO, represents an essentially planar 5-benzyl-idene-thia-zolidine moiety (r.m.s. deviation from planarity without ring substituents = 0.095 Å) to which the 4-amino-benzoic acid fragment is inclined at 76.23 (1)°. In the crystal, the benzoic acid mol-ecules are arranged in layers parallel to [001] which are built up from inversion d...
متن کاملN′-(4-Diethylamino-2-hydroxybenzylidene)-4-(dimethylamino)benzohydrazide methanol monosolvate
The title compound, C(20)H(26)N(4)O(2)·CH(3)OH, was prepared by the reaction of 4-diethyl-amino-2-hy-droxy-benzaldehyde with 4-(dimethyl-amino)-benzohydrazide. The dihedral angle between the two benzene rings is 13.6 (3)° and an intra-molecular O-H⋯N hydrogen bond generates an S(6) ring. In the crystal, the hydrazone and methanol mol-ecules are linked through inter-molecular O-H⋯O and N-H⋯O hyd...
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In the title compound, C(22)H(26)N(4)O(2), the phenyl ring and hy-droxy-benzene group are twisted with respect to the central pyrazolone ring, making dihedral angles of 54.05 (5) and 21.80 (6)°, respectively. One of the ethyl groups is disordered over two positions with site occupancies of 0.872 (6) and 0.128 (6). The mol-ecular structure features short intra-molecular O-H⋯N and C-H⋯O contacts....
متن کاملN′-(4-Diethylamino-2-hydroxybenzylidene)-4-methylbenzohydrazide
The title compound, C(19)H(23)N(3)O(2), was prepared by condensing 4-diethyl-amino-2-hy-droxy-benzaldehyde and 4-methyl-benzo-hydrazide in methanol. The asymmetric unit contains two independent mol-ecules in which the two benzene rings make dihedral angles of 30.3 (3) and 18.9 (3)°. Intra-molecular O-H⋯N hydrogen bonds are observed in both mol-ecules. The crystal structure is stabilized by N-H⋯...
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