title: 3,9-Dichloro-2,4,8,10-tetra-oxa-3,9-di-phosphaspiro-[5.5]undecane-3,9-dione.
abstract: In the title compound, C(5)H(8)Cl(2)O(6)P(2), the two six-membered rings display chair conformations. The P=O bond distances are 1.444 (2) and 1.446 (2) Å. Weak inter-molecular C-H⋯O hydrogen bonds are present in the crystal structure.
authors: Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retardant Materials, College of Science, Northeast Forestry University, Harbin 150040, People's Republic of China.
authors: Zhao-Shun
authors: ZS
authors: Zhan
authors: Hong
authors: H
authors: Wang
authors: Li-Ping
authors: LP
authors: Ding
authors: Chun-Mei
authors: CM
authors: Dong
authors: Cai-Ying
authors: CY
authors: Sun
references: Acta Crystallogr C. 2000 Jul;56 (Pt 7):905-6
references: 10935126
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677