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5-(4-Methyl-phen-yl)-1,3,4-oxadiazol-2-amine.

ABSTRACT: In the crystal structure of the title compound, C(9)H(9)N(3)O, adjacent mol-ecules are linked through N-H?N hydrogen bonds into a three-dimensional network.

SUBMITTER: Zheng J

PROVIDER: S-EPMC3379265 | biostudies-literature | 2012 Jun

REPOSITORIES: biostudies-literature

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5-(4-Methyl-phen-yl)-1,3,4-oxadiazol-2-amine.

Zheng Juan J Li Wen-Juan WJ Song Manman M Xu Yan Y

Acta crystallographica. Section E, Structure reports online 20120512 Pt 6

In the crystal structure of the title compound, C(9)H(9)N(3)O, adjacent mol-ecules are linked through N-H⋯N hydrogen bonds into a three-dimensional network. ...[more]

PMID: 22719463

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2-{3,4-Dibut-oxy-5-[5-(3-methyl-phen-yl)-1,3,4-oxadiazol-2-yl]thio-phen-2-yl}-5-(3-methyl-phen-yl)-1,3,4-oxadiazole.

Project description:In the title compound, C(30)H(32)N(4)O(4)S, the dihedral angles between the central thio-phene ring and the pendant oxadiazole rings are 10.1?(2) and 6.8?(3)°. The dihedral angles between each oxadiazole ring and its adjacent benzene ring are 6.8?(2) and 5.3?(3)°.

| S-EPMC2968503 | biostudies-literature

5-(2-Methyl-phen-yl)-1,3,4-thia-diazol-2-amine.

Project description:The asymmetric unit of the title compound, C(9)H(9)N(3)S, contains two crystallographically independent mol-ecules, in which the thia-diazole and tolyl rings are oriented at dihedral angles of 32.25 (3) and 74.50 (3)°. An intra-molecular C-H⋯S inter-action results in the formation of a five-membered ring. In the crystal structure, inter-molecular N-H⋯N hydrogen bonds link the mol-ecules into chains along the a axis. A π-π contact between the thia-diazole rings [centroid-centroid distance = 3.910 (3) Å] may further stabilize the structure. There is also a weak C-H⋯π inter-action.

| S-EPMC2977661 | biostudies-literature

5-Phenyl-1,3,4-oxadiazol-2-amine.

Project description:In the title complex, C(8)H(7)N(3)O, the C-O [1.369?(2) and 1.364?(3)?Å] and C=N [1.285?(3) and 1.289?(3)?Å] bond lengths in the oxadiazole ring are each almost identical within systematic errors, although different substituents are attached to the ring. The phenyl ring is inclined to the planar oxadiazole ring [r.m.s. deviation 0.002?Å] by 13.42?(18)°. In the crystal, molecules are linked via N-H?N hydrogen bonds, forming double-stranded chains propagating along [010].

| S-EPMC3470405 | biostudies-literature

2-(4-Chloro-phen-yl)-5-{3,4-dibut-oxy-5-[5-(4-chloro-phen-yl)-1,3,4-oxadiazol-2-yl]thio-phen-2-yl}-1,3,4-oxadiazole.

Project description:In the title compound, C(28)H(26)Cl(2)N(4)O(4)S, the dihedral angles between the two chloro-phenyl rings and the two oxadiazol rings are 10.51 (4)° and 13.55 (3)°, respectively. The thio-phene ring is oriented at dihedral angles of 5.59 (4)°, 8.33 (4)° and 4.41 (4)°, 11.05 (3)°, respectively, with respect to the two oxadiazol and the two chloro-phenyl rings. The intra-molecular C-H⋯O hydrogen bond results in the formation of a five-membered ring. In the crystal structure, π-π contacts between the oxadiazol rings, the chloro-phenyl rings and the chloro-phenyl and oxadiazol rings [centroid-centroid distances = 3.428 (3) Å, 3.750 (3) Å and 3.768 (3) Å, respectively] are present.

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1-[2-(3,4-Dichloro-phen-yl)-5-(3,4,5-trimethoxy-phen-yl)-2,3-dihydro-1,3,4-oxadiazol-3-yl]ethanone.

Project description: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 hydrogen bonds. Intra-molecular C-H⋯O and C-H⋯N hydrogen bonds are also present.

| S-EPMC2962074 | biostudies-literature

N-Phenyl-N-{4-[5-(4-pyrid-yl)-1,3,4-oxadiazol-2-yl]phen-yl}aniline.

Project description:The title compound, C(25)H(18)N(4)O, is a non-planar bipolar ligand containing triphenyl-amine and 1,3,4-oxadiazole units. In the mol-ecule, the benzene ring, the 1,3,4-oxadiazole ring, and the pyridine ring are twisted slightly with respect to each other [dihedral angle between the benzene and 1,3,4-oxadiazole rings = 9.4 (4) and between the 1,3,4-oxadiazole and pyridine rings = 3.0 (4)°]. Moreover, the dihedral angles between the two phenyl rings and the benzene ring are 88.2 (4) and 113.3 (4)°, and that between the two phenyl rings is 67.9 (4)°. The closest distances between the pyridine ring and the 1,3,4-oxadiazole and benzene rings in adjacent mol-ecules are 3.316 and 3.363 Å, respectively, indicating the existence of π-π inter-actions.

| S-EPMC2915300 | biostudies-literature

5-((Meth-oxy-imino)-{2-[(2-methyl-phen-oxy)meth-yl]phen-yl}meth-yl)-N-phenyl-1,3,4-oxa-diazol-2-amine.

Project description:In the title mol-ecule, C24H22N4O3, the plane of the oxa-diazole ring forms a dihedral angle of 32.41 (12)° with that of the phenyl ring and dihedral angles of 74.51 (10) and 56.38 (10)° with the planes of the benzene rings. In the crystal, pairs of N-H⋯N hydrogen bonds link molecules into inversion dimers featuring R 2 (2)(8) graph-set motifs.

| S-EPMC3998470 | biostudies-literature

2-(4-tert-Butyl-phen-yl)-5-{3,4-dibutoxy-5-[5-(4-tert-butyl-phen-yl)-1,3,4-oxadiazol-2-yl]-2-thienyl}-1,3,4-oxadiazole.

Project description:In the title compound, C(36)H(44)N(4)O(4)S, the dihedral angles between the central thio-phene ring and the pendent oxadiazole rings are 12.7 (2) and 13.7 (2)°, and the dihedral angles between the oxadiazole rings and their adjacent benzene rings are 6.1 (2) and 17.5 (2)°. An intra-molecular C-H⋯O inter-action may help to establish the conformation.

| S-EPMC2959615 | biostudies-literature

10-Ethyl-3-(5-methyl-1,3,4-oxadiazol-2-yl)-10H-phenothia-zine.

Project description:In the title compound, C(17)H(15)N(3)OS, the phenothia-zine ring system is slightly bent, with a dihedral angle of 13.68?(7)° between the benzene rings. The dihedral angle between the oxadiazole ring and the adjacent benzene ring is 7.72?(7)°. In the crystal, a ?-? inter-action with a centroid-centroid distance of 3.752?(2)?Å is observed between the benzene rings of neighbouring mol-ecules.

| S-EPMC3295441 | biostudies-literature

1-[2-(4-Chloro-phen-yl)-5-phenyl-2,3-dihydro-1,3,4-oxadiazol-3-yl]ethanone.

Project description:In the title compound, C(16)H(14)ClN(3)O(2), the 2,3-dihydro-1,3,4-oxadiazole ring [maximum deviation = 0.030?(1)?Å] and the pyridine ring [maximum deviation = 0.012?(1)?Å] are inclined slightly to one another, making a dihedral angle of 11.91?(5)°. The chloro-substituted phenyl ring is almost perpendicular to the 2,3-dihydro-1,3,4-oxadiazole and pyridine rings at dihedral angles of 86.86?(5) and 75.26?(5)°, respectively. In the crystal, ?-? [centroid-centroid distance = 3.7311?(6)?Å] and C-H?? inter-actions are observed.

| S-EPMC3379458 | biostudies-literature

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