Peiliang Zhao, Zhong-Zhen Zhou
Jul 29, 2009
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Journal
Acta Crystallographica Section E: Structure Reports Online
Abstract
The title molecule, C18H14N2O5S·C3H7NO, comprises of a carboxamide group bonded to a furan ring and a distorted envelope-shaped 4-oxothiazolidin-3-yl group which is connected to a substituted 6-methyl-4-oxo-4H-chromen-3-yl group. Extensive strong N—H⋯O and weak C—H⋯O intermolecular hydrogen-bonding interactions occur between dimethylformamide (DMF), the crystallizing solvent, and the various heterocyclic groups within the compound, as well as additional weak C—H⋯O interactions between the heterocyclic groups themselves. The carboxyl group of the DMF solvent molecule forms a trifurcated (four-center) acceptor hydrogen-bond interaction with the carboxamide, furan and 6-methyl-4-oxo-4H-chromen-3-yl groups. The dihedral angles between the planar chromone group [maximum deviation = 0.0377 (18)°] and those of the furan and 4-oxothiazolidin-3-yl groups are 89.4 (6) and 78.5 (1)°, respectively.