Abstract
The title compound, C16H10N2O5S, was synthesized via the condesation of dihydrothiophen-3(2H)-one 1,1-dioxide, 1H-indene-1,2,3-trione and malononitrile in ethanol. The 2,3-dihydrothiophene 1,1-dioxide and pyran rings adopt envelope conformations. The mean planes through the planar part of the pyran ring and the benzene ring are nearly perpendicular, forming a dihedral angle of 88.40 (7)°. The crystal packing is stabilized by intermolecular N—H⋯O and N—H⋯N hydrogen bonds with the sulfone O atom and the cyano N atom acting as acceptors.
Highlights
The title compound, C16H10N2O5S, was synthesized via the condesation of dihydrothiophen-3(2H)-one 1,1-dioxide, 1Hindene-1,2,3-trione and malononitrile in ethanol
The crystal packing is stabilized by intermolecular N—H O and N—H N
H atoms treated by a mixture of independent and constrained refinement max = 0.58 e Å3
Summary
50 -Amino-1,3-dioxo-20 ,30 -dihydro-70 Hspiro[indane-2,70 -thieno[3,2-b]pyran]60 -carbonitrile 10 ,10 -dioxide. Shun-Hua Wang,a* Yue-Ning Jiangb and Jiang-Na Zhanga a School of Mechatronic Engineering, Lanzhou Jiaotong University, Lanzhou 730070, People’s Republic of China, and bSchool of Civil Engineering, Lanzhou Jiaotong. R factor = 0.058; wR factor = 0.127; data-to-parameter ratio = 11.3. The title compound, C16H10N2O5S, was synthesized via the condesation of dihydrothiophen-3(2H)-one 1,1-dioxide, 1Hindene-1,2,3-trione and malononitrile in ethanol. The 2,3dihydrothiophene 1,1-dioxide and pyran rings adopt envelope conformations. The mean planes through the planar part of the pyran ring and the benzene ring are nearly perpendicular, forming a dihedral angle of 88.40 (7). The crystal packing is stabilized by intermolecular N—H O and N—H N hydrogen bonds with the sulfone O atom and the cyano N atom acting as acceptors
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