3,9-Di-2-furyl-2,4,8,10-tetraoxaspiro[5.5]undecane
نویسندگان
چکیده
The title compound, C(15)H(16)O(6), was prepared by reaction of 2,2-bis-(hydroxy-meth-yl)propane-1,3-diol with 2-furaldehyde in the presence of hydro-chloric acid at room temperature. The asymmetric unit contains two crystallographically independent mol-ecules. In these two mol-ecules, the dihedral angles between the five-membered rings are 56.4 (3) and 56.3 (3)°. The six-membered rings adopt chair conformations. Inter-molecular C-H⋯π inter-actions link the mol-ecules and may be effective in the stabilization of the crystal structure.
منابع مشابه
2,4,8,10-Tetraoxa-3,9-dithiaspiro[5.5]undecane 3,9-dioxide
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.
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In the title compound, C(27)H(24)O(4), the 1,3-dioxane rings have chair conformations. The mol-ecule has non-crystallographic twofold rotation symmetry. The dihedral angle between the naphthalene ring systems is 17.96(4)° In the crystal structure, weak inter-molecular C-H⋯π inter-actions contribute to the crystal packing.
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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.
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