title: 2,4,8,10-Tetra-oxa-3,9-dithia-spiro-[5.5]undecane 3,9-dioxide.
abstract: The asymmetric unit of the title compound, C(5)H(8)O(6)S(2), consists of two spiro-[5.5]undecane mol-ecules. The nonplanar six-membered rings adopt chair conformations. In the crystal structure, weak inter-molecular C-H⋯O inter-actions, together with close O⋯S contacts in the range 3.308 (3)-3.315 (3) Å, stabilize the packing.
authors.forename: Zai-Ying
authors.initials: ZY
authors.lastname: Rao
authors.forename: Xin
authors.initials: X
authors.lastname: Xiao
authors.forename: Yun-Qiang
authors.initials: YQ
authors.lastname: Zhang
authors.forename: Sai-Feng
authors.initials: SF
authors.lastname: Xue
authors.forename: Zhu
authors.initials: Z
authors.lastname: Tao