In the title compound, C19H18N2O3, the pyrazoline ring is close to being planar (r.m.s. deviation = 0.035 Å) and subtends dihedral angles of 2.11 (8) and 82.63 (8)° with the p-tolyl and benzene rings, respectively. In the crystal, C-H⋯O and C-H⋯N hydrogen bonds link the mol-ecules, forming a three-dimensional network. A weak C-H⋯π inter-action involving the benzene ring is also observed.

The title compound, C(23)H(25)NSi, has an eight-membered silicon-containing heterocyclic ring with an intra-molecular N⋯Si close contact, the transannular distance of which is 2.6294 (18) Å. The resulting geometry about the Si atom is distorted trigonal-bypyramidal, with the N and H atoms occupying apical sites. The dihedral angle between the aromatic rings fused to the eight-membered ring is 6...

In the title compound, C(38)H(30)N(2)O(2), the acenaphthyl-ene ring is close to being planar [maximum deviation = 0.1047 (11) Å]. The dihedral angles between the three benzene rings and the acenaphthyl-ene system are 39.47 (3), 37.65 (3) and 44.47 (3)°. An intra-molecular O-H⋯N inter-action forms an S(5) hydrogen-bond ring motif. In the crystal, mol-ecules are linked into [101] chains by a set ...

In the title compound, C(25)H(25)FN(4)OS, the thienopyrimidine fused-ring system is close to planar (r.m.s. deviation = 0.0089 Å), with a maximum deviation of 0.0261 (17) Å for the N atom adjacent to the benzene ring. This thienopyrimidine fused-ring system forms dihedral angles of 64.73 (3) and 81.56 (5)° with the adjacent benzyl and fluoro-phenyl rings, respectively. Inter-molecular N-H⋯F and...

In the title mol-ecule, C21H20ClN3OS, the tetra-cyclic system is close to planar [r.m.s. deviation = 0.110 (4) Å]. The dihedral angle between the quinoline ring system and the benzene ring is 178.3 (1)° and the angle between two (S-C=C-N) halves of the thia-zine ring is 173.4 (1)°. In the crystal, mol-ecules are arranged via π-π inter-actions [centroid-centroid distances = 3.603 (2)-3.739 (2) Å...

We discuss the excitable behavior of excitons and biexcitons in a nonlinear optical ring cavity. The nonlinearity is due to the process of the creation of biexcitons by photon-assisted conversion of excitons. In the bifurcation analysis a region where a saddle point is close to an equilibrium has been found. In this region the system shows excitability. It is shown that the mechanism of the exc...

A 25-day-old male neonate was received in our outpatient department with constriction ring of right leg with bluish discoloration and swelling of foot and acro-syndactly of both hands. The constriction ring was threatening to the limb that already had lost digits as an in-utero event. Multiple Z-Plasties of half circumference of leg was done with release of constriction band. Wound was stitched...

In the title compound, C(20)H(26)O(2), which is the 6-methyl-ene derivative of androstenedione and a synthetic percursor of exemestane, the steroid A ring approximates to a sofa (or envelope) conformation, with the methyl-ene group adjacent to the link to the B ring lying out of the plane of the other atoms. The B and C rings have slightly flattened chair conformations and the D ring is an enve...

The title mol-ecule, C(16)H(16)O(5), is twisted; the dihedral angle between the furan and 3,4,5-trimeth-oxy-phenyl rings is 12.14 (13)°. The two meth-oxy groups at the meta positions of the benzene ring are close to being coplanar with the ring [C-O-C-C = -0.6 (3) and 1.4 (3)°], whereas the third meth-oxy group, at the para position, is (+)-anti-clinal with respect to the benzene ring [C-O-C-C ...

The title compound, C(15)H(12)N(2)OS, adopts a twisted V-shape, with the S atom as the pivot. The benzimidazole ring system [maximum deviation = 0.015 (1) Å] makes a dihedral angle of 78.56 (7)° with the phenyl ring. The O atom of the ketone group is close to coplanar with its adjacent ring [O-C-C-C torsion angle = 11.0 (2)°]. In the crystal, mol-ecules are linked by N-H⋯N hydrogen bonds into a...