2-4 Chalnicon

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منابع مشابه

SELENIUM HETEROCYCLES XXXX [I] SYNTHESES OF 4- (2-PYRAZINYL) - 1, 2, 3: SELENADIAZOLE AND 4- (2-PYRAZILYL)' - l,2,3- THIADIAZOLE

Reaction of thionyl chloride with 2-acetyl-1- benzenesulfonylpyrrole semicarbazone (6 c) gave 4 - (1- benzenesulfonyl-2 - pyrrolyl) - 1, 2, 3 -thiadiazole (lc). Selenium dioxide oxidation of 2-acetylpyrazine semicarbazone (10) in acetic acid afforded 4- (2-pyrazinyl) - 1, 2, 3- selenadiazole (4). Reaction of thionyl chloride with compound 10 gave 4- (2-pyrazinyl) - 1, 2, 3- thiadiazole (3)....

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2-(4-Fluoro­phen­yl)-2-oxoethyl 4-meth­oxy­benzoate

In the title compound, C(16)H(13)FO(4), the dihedral angle between the benzene rings is 84.28 (8)°. In the crystal, C-H⋯F and C-H⋯O hydrogen bonds link the mol-ecules to form a three-dimensional network. The crystal structure is consolidated by C-H⋯π inter-actions and short F⋯F contacts [2.7748 (14) Å] also occur.

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2-(4-Bromo­phen­yl)-2-oxoethyl 4-chloro­benzoate

The asymmetric unit of the title compound, C(15)H(10)BrClO(3), consists of three crystallographically independent mol-ecules. The dihedral angles between the benzene rings in the three mol-ecules are 68.8 (2), 0.7 (3) and 66.1 (2)°. In the crystal, the three independent mol-ecules are inter-connected by C-H⋯O hydrogen bonds, leading to isolated trimers.

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2-(4-Bromo­phen­yl)-2-oxoethyl 4-bromo­benzoate

The asymmetric unit of the title compound, C(15)H(10)Br(2)O(3), consists of three crystallographically independent mol-ecules (A, B and C). The phenyl rings in mol-ecules A, B and C make dihedral angles of 6.1 (3), 3.2 (2) and 54.6 (2)° to each other, respectively. In the crystal, mol-ecules are linked into two-dimensional layers parallel to the ab plane by inter-molecular C-H⋯O hydrogen bonds....

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2-(4-Bromo­phen­yl)-2-oxoethyl 4-hy­droxy­benzoate

In the title compound, C(15)H(11)BrO(4), the dihedral angle between the aromatic rings is 66.77 (8)°. In the crystal, O-H⋯O, C-H⋯Br and C-H⋯O hydrogen bonds link the mol-ecules, forming layers lying parallel to (101). The crystal packing is further consolidated by C-H⋯π inter-actions and π-π stacking inter-actions [centroid-centroid distance = 3.5476 (7) Å].

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ژورنال

عنوان ژورنال: The Journal of the Institute of Television Engineers of Japan

سال: 1974

ISSN: 1884-9644

DOI: 10.3169/itej1954.28.875