title: 3,9-Bis(2,4-dichloro-phen-yl)-2,4,8,10-tetra-oxaspiro-[5.5]undeca-ne.
abstract: In the title compound, C(19)H(16)Cl(4)O(4), the two halves of the mol-ecule are related by a crystallographic twofold rotation axis passing through the central spiro-C atom. The two non-planar six-membered heterocycles both adopt chair conformations, and the dihedral angle between the two benzene rings is 76.6 (1)°. In the crystal structure, inter-molecular C-H⋯O hydrogen bonds link the mol-ecules into chains along the c axis.
authors: Key Laboratory of Fine Chemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, People's Republic of China.
authors: Zhengyi
authors: Z
authors: Li
authors: Qiuzheng
authors: Q
authors: Tang
authors: Kang
authors: K
authors: Wu
authors: Shuling
authors: S
authors: Yu
authors: Xiaoqiang
authors: X
authors: Sun
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677
references: Molecules. 2008 Nov 17;13(11):2848-58
references: 19015624