In the title compound, C(19)H(19)NO(4), the dihedral angle between the mean planes through the benzene rings is 82.18 (7)°. The C=N double bond is trans-configured. The mol-ecules are linked into centrosymmetric dimers via pairs of O-H⋯N hydrogen bonds with the motif R(2) (2)(6). The crystal packing also features C-H⋯O inter-actions. The methyl group attached to one of the aromatic rings is dis...

In the title compound, C(18)H(16)N(2)O(2), the hy-droxy-ethanimine group is essentially coplanar with the ring to which it is attached (C-C-N-O torsion angle = -176.9°). Mol-ecules are linked into cyclic centrosymmetric R(2) (2)(6) dimers via O-H⋯N hydrogen bonds.

In the title compound, C(18)H(16)N(2)O(2), the dihedral angle between the mean planes through the two benzene rings is 56.8 (6)°. The enoate group assumes an extended conformation. The hy-droxy-ethanimine group is essentially coplanar with the benzene ring, the largest deviation from the mean plane being 0.047 (1) Å for the hy-droxy-imino O atom. In the crystal, the mol-ecules are linked into c...

The asymmetric unit of the title compound, C(19)H(18)I(4)N(2)O(2), comprises a potentially tetra-dentate Schiff base ligand. The disordered H atoms on the N and O atoms were refined with site occupancies of 0.54 (8)/0.46 (8) and 0.59 (7)/0.41 (7), respectively. The dihedral angle between the benzene rings is 73.3 (3)°. Intra-molecular O-H⋯N and N-H⋯O hydrogen bonds make S(6) ring motifs. Short ...

The asymmetric unit of the title Schiff base compound, C(21)H(18)N(2)O(4), consists of four independent zwitterions (A, B, C and D) with similar conformations. In each independent mol-ecule, the methyl group is disordered over two positions; the occupancies of the two positions are 0.819 (5) and 0.181 (5) in mol-ecule A, 0.912 (5) and 0.088 (5) in B, 0.734 (5) and 0.266 (5) in C, and 0.940 (6) ...

background: understanding of cellular and molecular mechanisms involved in cell/tumor growth and progression has led to molecular-targeted therapy. her1 and her2 are two main oncogenic components of her-receptor family considered as targets for cancer research and therapy. reliable results of her- related research and targeted therapies dependent upon cell line with known her expression status....

The *resonating valence bond. (RVB) state has been proposed as the basis for an explanation of high-temperature superconductivity. Recently, we have described the charge and spin excitations about this state, and have shown that they are solitons, precisely analogous to those found in polyacetylene. Since the charged solitons are + e bosons, it is natural to ask whether flux quantization will o...

The asymmetric unit of the title compound, C(18)H(16)Br(4)N(2)O(2), comprises half the molecule, which is located adjacent to an inversion centre at the mid-point of the central C-C bond of the butane-1,4-diamine segment. There are two intra-molecular O-H⋯N hydrogen bonds making S(6) ring motifs. In the crystal, mol-ecules are linked by pairs of weak C-H⋯Br inter-actions into chains along [101]...

In the title compound, C(19)H(18)Cl(4)N(2)O(2), a potential tetra-dentate Schiff base ligand, the dihedral angle between the two benzene rings is 48.01 (10)°. The configuration about the two C=N bonds is E and two intra-molecular O-H⋯N hydrogen bonds make S(6) ring motifs. In the crystal, mol-ecules are linked along the b axis via inter-molecular C-H⋯Cl inter-actions. The crystal structure is f...

In the title coumarin derivative, C28H26N2O2, the coumarin unit is approximately planar, with a maximum deviation of 0.048 (3) Å. The central benzene ring is oriented at dihedral angles of 30.15 (14) and 10.51 (11)°, respectively, to the pyridine ring and coumarin ring system. In the crystal, weak C-H⋯O and C-H⋯N hydrogen bonds and weak C-H⋯π inter-actions link the mol-ecules into a three-dimen...