Received 16 March 2011
aShaoyang Medical College Level Specialty School, Department of Pharmacy, Shaoyang, Hunan 422000, People's Republic of China,bRed Cross Hospital at Xinshao County of Hunan Province, Shaoyang, Hunan 422000, People's Republic of China, and cChemistry Science and Technology School, Zhanjiang Normal University, Zhanjiang, Guangdong 524048, People's Republic of China
Correspondence e-mail: firstname.lastname@example.org
In the title compound, C20H22O8S, the dihedral angle between the two benzene rings is 81.6 (3)°. The benzene-connected portions of the alkoxy substituents are almost coplanar with their respective rings [C-C-O-C torsion angles of 174.77 (17) and -178.5 (4)°]. One of the butanoic acid groups is disordered over two conformations with a site-occupancy ratio 0.719 (6):0.281 (6). In the crystal, pairs of O-HO hydrogen bonds link the molecules into infinite zigzag chains along .
For bisphenol S (systematic name 4,4'-sulfonyldiphenol) as a reactant in epoxy reactions and its use in fast-curing epoxy resin glues, see: Askarinejad & Morsali (2006); Danzl et al. (2009); Bashiri et al. (2009). For its use in the manufacture of pharmaceuticals, adhesives, biocides and agricultural products, see: Howard & David (2002); Howard et al. (2005); Yasue et al. (2009). For synthesis details and a related structure, see: Zheng et al. (2007).
Data collection: SMART (Bruker, 2007); cell refinement: SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: PK2315 ).
The authors gratefully acknowledge financial support from the Education Department of Hunan Province (grant No. 10C0294).
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