In the title compound, C14H10ClF2NO, the dihedral angle between the mean planes of the 4-chloro-phenyl and 3,4-di-fluoro-phenyl rings is 65.2 (1)°. These two planes are twisted by 83.5 (5) and 38.9 (9)°, respectively, from that of the acetamide group. In the crystal, N-H⋯O hydrogen bonds form infinite chains along [100]. Weak C-H⋯O and C-H⋯F inter-actions are also observed and stack mol-ecules ...

The full mol-ecule of the title compound, C(12)H(10)Cl(2)N(2)S(2), is generated by the application of a centre of inversion. The thio-phene and imine residues are co-planar [the N-C-C-S torsion angle is -2.5 (4)°] and the conformation about the imine bond [1.268 (4) Å] is E. Supra-molecular arrays are formed in the bc plane via C-Cl⋯π inter-actions and these stack along the a axis.

In the title compound C(11)H(13)N(3)OS, the aromatic ring and the dihydro-pyrazole ring are oriented orthogonally with respect to each other, making a dihedral angle of 89.92 (9)°. An intra-molecular O-H⋯S hydrogen bond occurs. In the crystal, weak N-H⋯N and N-H⋯S hydrogen bonds link the mol-ecules into a columnar stack propagating along the b axis.

In the centrosymmetric title compound, C(17)H(11)N(3)O(2), the dihedral angle between the central and pendant pyridyl rings is 50.29 (9)°. In the crystal, mol-ecules stack along the a axis by π-π inter-actions between the pyridine rings with centroid-centroid distances of 3.845 (2) Å. The N atom and one of the C atoms of the central ring are disordered by symmetry.

We propose a structure based on combination of multilayer stack of dielectric films and thin metal layer for excitation and enhancement of both s- and p-polarized evanescent waves. It is shown that two different mechanisms of evanescent wave excitation may occur at the same angle of light beam incidence on the structure. Application for evanescent wave polarization holographic recording with th...

In the crystal structure of the title compound, C(14)H(12)FNO, the amide -NHCO- mean plane makes dihedral angles of 28.6 (2) and 37.5 (2)° with the mean planes through the fluoro-benzene and methyl-benzene units, respectively. The dihedral angle between the two benzene ring mean planes is 65.69 (10)°. In the crystal structure, mol-ecules are linked through N-H⋯O hydrogen bonds and stack along t...

In the title compound, C12H13N3O, the morpholine ring adopts a chair conformation and its mean plane is inclined to that of the benzene ring by 16.78 (12)°. The N-N=C-C bridge, which has an E conformation, has a torsion angle of 173.80 (19)°. In the crystal, mol-ecules stack along the a axis but there are no significant inter-molecular inter-actions present.

Reflections and refractions from wide-angle, densely sampled, multi channel streamer data are transformed automatically to the slowness-depth domain using a downward continuation algorithm. The method may be used to rapidly obtain velocity functions for use in pre-stack depth migration processes. Incorporation of the reflection data has the potential to produce velocity images in complex geolog...

We study the performance of achromatic half-wave plates (AHWP) as a function of their construction parameters, the detection bandwidth of a power detector operating in the millimeter wave band, and the spectral shape of the incident radiation. We focus particular attention on the extraction of the degree of incident polarization and its orientation angle from the intensity measured as a functio...