X-ray investigations of benzopyran derivatives substituted at position 3

Autor:	A. J. Rybarczyk, Magdalena Małecka, T. A. Olszak, J. Nawrot-Modranka
Rok vydání:	1999
Předmět:	chemistry.chemical_classification Bicyclic molecule Hydrogen bond Stereochemistry X-ray Hydrazone Trigonal pyramidal molecular geometry General Medicine Crystal structure General Biochemistry Genetics and Molecular Biology Benzopyran Crystallography chemistry.chemical_compound chemistry Molecule
Zdroj:	Acta Crystallographica Section C Crystal Structure Communications. 55:1313-1315
ISSN:	0108-2701
Popis:	The structures of two isomeric compounds, (E)-3-{[2-(dimethoxythiophosphoryl)-2-methylhydrazino]-methylidene}-3,4-dihydro-2H-1-benzopyran-2,4-dione, C 13 H 15 N 2 O 5 PS, and 3-{[2-(dimethoxythiophosphoryl)-2-methylhydrazino]carbonyl}-3,4-dihydro-4H-1-benzopyran-4-one, C 13 H 15 N 2 O 5 PS, have been determined from X-ray data and compared. The benzopyran moieties of both molecules are planar. Extra six-membered rings are formed by N-H...O hydrogen bonds. The geometry around the P atoms is tetrahedral, slightly deformed to trigonal pyramidal.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d53ee7e6f103fd22bdac55cacff1c2b6 https://doi.org/10.1107/s0108270199004734 Zobrazit plný text záznamu Plný text