X-ray investigations of benzopyran derivatives substituted at position 3

Authors
Rybarczyk, AJ Olszak, TA Malecka, M Nawrot-Modranka, J
Citation
Aj. Rybarczyk et al., X-ray investigations of benzopyran derivatives substituted at position 3, ACT CRYST C, 55, 1999, pp. 1313-1315
Citations number
10
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS
ISSN journal
01082701 → ACNP
Volume
55
Year of publication
1999
Part
8
Pages
1313 - 1315
Database
ISI
SICI code
0108-2701(19990815)55:<1313:XIOBDS>2.0.ZU;2-F
Abstract
The structures of two isomeric compounds, (E)-3-{[2-( dimethoxythiophosphor yl)-2-methylhydrazino]methylidene}-3,4-dihydro-2H-1-benzopyran-2,4-dione, C 13H15N2O5PS, and 3-{[2-(dimethoxythiophosphoryl)-2-methylhydrazino] carbony l}-3,4-dihydro-4H-1-benzopyran-4-one, C13H15N2O5PS, have been determined fr om X-ray data and compared. The benzopyran moieties of both molecules are p lanar. 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.