The title compound, C(19)H(18)Cl(2)N(2)O(5), was synthesized by the reaction of N'-(3,4-dichloro-benzyl-idene)-3,4,5-trimethoxy-benzo-hydrazide and acetic anhydride. The oxadiazole ring makes dihedral angles of 82.82 (7) and 9.92 (7)° with the 3,4-dichloro-benzene and the 3,4,5-trimethoxy-benzene ring planes, respectively. The crystal structure is stabilized by inter-molecular C-H⋯ O and C-H⋯ N...

IN THE TITLE SYDNONE COMPOUND [SYSTEMATIC NAME: 3-(2,3-dimethyl-5-oxo-1-phenyl-2,5-dihydro-1H-pyrazol-4-yl)-1,2,3-oxadiazol-3-ium-5-olate], C(13)H(12)N(4)O(3), the oxadiazole and pyrazole rings are essentially planar [maximum deviations = 0.006 (1) and 0.019 (1) Å, respectively] and are inclined at inter-planar angles of 37.84 (4) and 46.60 (4)°, respectively, with respect to the benzene ring. ...

We have performed molecular dynamics simulations of a 2,5-bis-(p-hydroxyphenyl)-1,3,4-oxadiazole mesogen (ODBP-Ph-C(7)) at a fully atomistic level for a range of temperatures within the region that has experimentally been assigned to a biaxial nematic phase. Analysis of the data shows that the simulated nematic phase is biaxial but that the degree of biaxiality is small. The simulations show al...

In the title compound, C(18)H(16)ClN(3)O(5)S(2), the dihedral angles between the oxadiazole ring and the phenyl and chloro-benzene rings are 23.4 (2) and 45.4 (2)°, respectively. The C-S-N-C and C(ox)-C-S-C (ox = oxadiazole) torsion angles are 89.3 (5) and -69.1 (3)°, respectively. A short intra-molecular C-H⋯O contact closes an S(6) ring. In the crystal, mol-ecules are linked by N-H⋯O hydrogen...

In the title mol-ecule, C(12)H(10)N(6)O, the dihedral angle between the two pyrazine rings [planar to within 0.009 (3) and 0.018 (3) Å] is 5.62 (15)°. They deviate from the central oxadiazole ring [planar to within 0.005 (3) Å] by 1.52 (16) and 5.55 (17)°, respectively. In the crystal, C-H⋯N inter-actions involving the pyrazine rings connect mol-ecules to form zigzag supramolecular chains propa...

New sugar hydrazones linked to norbornyl ring system, their oxadiazole acyclic nucleoside analogs and the corresponding thioglycosides were synthesized. The synthesized compounds were tested for their antimicrobial activity and displayed different degrees of activities or inhibitory actions. Their oxadiazole acyclic nucleoside analogs and thioglycosides showed higher activities.

The splay and bend elastic constants of the bent-core oxadiazole material [C5-Ph-ODBP-Ph-OC12] have been investigated as a function of temperature across the nematic phase. The bend constant K(33) is found to take values of ~3.0 pN and to be almost temperature independent, whereas, the splay constant K(11) increases monotonically from ~3.5 pN close to the isotropic phase transition to values of...

In the title compound, C(36)H(30)N(6)O(3)S(3), the phenyl rings are twisted from the attached oxadiazole rings in the three arms by 1.5(2), 2.4 (2) and 25.7 (2)°. The crystal packing exhibits weak inter-molecular C-H⋯N inter-actions.