3,3,6,6-Tetra-methyl-9-(2-nitro-phen-yl)-3,4,6,7-tetra-hydro-2H-xanthene-1,8(5H,9H)-dione

Yingming Mo; Hong-Jun Zang; Bo-Wen Cheng

doi:10.1107/S1600536810029211

3,3,6,6-Tetra-methyl-9-(2-nitro-phen-yl)-3,4,6,7-tetra-hydro-2H-xanthene-1,8(5H,9H)-dione

Acta Crystallogr Sect E Struct Rep Online. 2010 Jul 31;66(Pt 8):o2129. doi: 10.1107/S1600536810029211.

Authors

Yingming Mo¹, Hong-Jun Zang, Bo-Wen Cheng

Affiliation

¹ Department of Enviromental and Chemistry Engineering, Tianjin Polytechnic University, State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin 300160, People's Republic of China.

Abstract

In the title compound, C(23)H(25)NO(5), the pyran ring adopts a flattened boat conformation, while the two cyclo-hexenone rings are in envelope conformations. The 3-nitro-phenyl ring is almost perpendicular to the pyran ring, making a dihedral angle of 87.1 (3)°.