In the title complex, [Cu(C(17)H(13)N(2)O)(2)], the Cu(II) atom is tetra-coordinated by two N atoms and two O atoms from two bidentate 1-[(E)-o-tolyl-diazen-yl]-2-naphtho-late ligands, forming a slightly distorted square-planar environment. The two N atoms and two O atoms around the Cu(II) atom are trans to each other, with an O-Cu-O bond angle of 177.00 (9)° and an N-Cu-N bond angle of 165.63 ...

THE TITLE COMPOUND [SYSTEMATIC NAME: (E)-1-(2-hydroxy-4,6-dimethoxyphenyl)-3-phenylprop-2-en-1-one], C(17)H(16)O(4), has an aromatic ring at both ends of the -CH= CH-C(=O)- fragment with the -CH=CH- bond in a trans configuration. The phenyl ring is nearly coplanar with this fragment [dihedral angle 4.8 (3) °] as is the hy-droxy-ldimeth-oxy-lphenyl unit [dihedral angle 6.3 (3) °]. The hy-droxy g...

The piperidin-4-one ring in the title compound, C(26)H(26)Cl(2)N(2)O, exists in a chair conformation with equatorial orientations of the methyl and 4-chlorophenyl groups. The C atom bonded to the oxime group is statistically planar (bond-angle sum = 360.0°) although the C-C=N bond angles are very different [117.83 (15) and 127.59 (15)°]. The dihedral angle between the chloro-phenyl rings is 54....

The title Schiff base compound, C(13)H(11)N(3)O(5)S, exists in an E configuration with respect to the C=N double bond. The benzene rings are almost coplanar, making a dihedral angle of 2.82 (6). The sulfonamide group is twisted away from the attached phenyl ring with an N-S-C-C torsion angle of 64.84 (11)°. An intra-molecular O-H⋯N hydrogen bond stabilizes the mol-ecule, generating an S(6) ring...

A generalization of the well known atom-diatom scattering hamiltonian to a coordinate system of two lengths and an angle is derived, another special case of which is a previously known bond angle-bond length hamiltonian. Different axis embeddings are also considered. The formalism is applied to the ro-vibrational levels of D2 H+, CH~ and HDHe (A 1A') and the advantage of a judicious choice of c...

In the crystal of the title compound, C(13)H(12)N(2)O(4)S, the conformation of the N-H bond in the -SO(2)-NH- segment is syn to the ortho-nitro group in the sulfonyl benzene ring. The mol-ecule is twisted at the S-N bond with a torsion angle of 76.55 (18)°. The dihedral angle between the planes of the rings is 72.64 (8)°. In the crystal, mol-ecules are linked by pairs of N-H⋯O(S) hydrogen bonds...

In the title compound, C(12)H(9)Cl(2)NO(2)S, the conformation of the N-H bond is syn to the 2-chloro group and anti to the 3-chloro group of the aniline benzene ring. The mol-ecule is bent at the S atom with a C-SO(2)-NH-C torsion angle of 66.4 (2)°. The two rings form a dihedral angle of 73.3 (1)° and an intra-molecular N-H⋯Cl hydrogen bond occurs. The crystal structure features chains linked ...

The mol-ecule of the title Schiff base compound, C14H14N2O2, displays an E conformation with respect the imine C=N double bond. The mol-ecule is approximately planar, with the dihedral angle formed by the planes of the pyridine and benzene rings being 5.72 (6)°. There is an intra-molecular hydrogen bond involving the phenolic H and imine N atoms.

The mol-ecule of the title compound, C(22)H(26)N(2)O, displays a trans configuration with respect to the C=N double bond. The dihedral angle between the planes of the two aromatic rings is 26.30 (15)°. There is a strong intra-molecular O-H⋯N hydrogen bond between the imine and hydroxyl groups.

In the title compound, C(14)H(12)ClNO(3)S, the N-H bond is anti-periplanar to the C=O bond. The dihedral angle between the two aromatic rings is 78.7 (1)°. The crystal structure features inversion-related dimers linked by pairs of N-H⋯O(S) hydrogen bonds.