Acta Crystallographica Section E: Crystallographic Communications | |
Crystal structure of rac-3,9-bis(2,6-difluorophenyl)-2,4,8,10-tetraoxaspiro[5.5]undecane | |
Chen, L.1  Sun, X.2  Li, Z.2  Jin, L.2  Wang, Z.2  | |
[1] Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University, Changzhou 213164, Jiangsu, People's Republic of China;Key Laboratory of Fine Chemical Engineering, Changzhou University, Changzhou, 213164, Jiangsu, People's Republic of China | |
关键词: CRYSTAL STRUCTURE; OXO-SPIROCYCLIC; HELICAL HYDROGEN-BONDED CHAINS; AXIAL CHIRALITY; | |
DOI : 10.1107/S2056989015001206 | |
学科分类:数学(综合) | |
来源: International Union of Crystallography | |
【 摘 要 】
The title compound, C19H16F4O4, was prepared by the condensation reaction of 2,6-difluorobenzaldehyde and pentaerythritol. The whole molecule is generated by twofold rotational symmetry. The two six-membered O-heterocycles adopt chair conformations through a shared spiro-carbon atom that is located on the crystallographic twofold rotation axis. In this conformation, the two aromatic rings are located at the equatorial positions of the O-heterocycles. The conformation of this doubly substituted tetraoxaspiro system is chiral. In the crystal, molecules are linked by C—H⋯O hydrogen bonds, forming layers parallel to (100). These layers are linked by C—H⋯F hydrogen bonds into a three-dimensional structure.
【 授权许可】
CC BY
【 预 览 】
Files | Size | Format | View |
---|---|---|---|
RO201904035376147ZK.pdf | 664KB | download |