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Crystals 2016, 6(10), 134;

Synthesis and Crystal Structures of Two New Oxaspirocyclic Compounds

MicroScale Science Institute, Department of Chemistry, Chemical Engineering and Environmental Engineering, Weifang University, Weifang 261061, China
Author to whom correspondence should be addressed.
Academic Editor: Helmut Cölfen
Received: 3 August 2016 / Revised: 19 September 2016 / Accepted: 6 October 2016 / Published: 18 October 2016
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Two new oxaspirocyclic compounds, 8-(4-(dimethylamino)benzylidene)-6,10-dioxaspiro[4.5]decane-7,9-dione (1) and 8-(4-hydroxybenzylidene)-6,10-dioxaspiro[4.5]decane-7,9-dione (2) have been synthesized and their structures determined by single crystal X-ray crystallography. Compound 1, C17H19NO4, belongs to the monoclinic system, space group P21/c with a = 6.2554(13) Å, b = 14.605(3) Å, c = 16.265(3) Å, β = 95.97(3)°, V = 1477.9(5) Å3, Z = 4, Dc = 1.354 g/cm3, F(000) = 640, μ(MoKa) = 0.097 mm−1, the final R = 0.0570 and wR = 0.1667. Compound 2, C15H14O5, is also of the monoclinic system, space group P21/c with a = 10.739(2) Å, b = 18.348(4) Å, c = 6.7799(14) Å, β = 104.20(3)°, V = 1295.1(5) Å3, Z = 4, Dc = 1.407 g/cm3, F(000) = 608, μ(MoKa) = 0.106 mm−1, the final R = 0.0568 and wR = 0.1739. Some C–H···O intra- and intermolecular hydrogen bonds and π··· π stacking interactions are both observed in the two lattice structures. The difference between them is that one type of C–H···π supramolecular interaction (1) and one type of O–H···O intermolecular hydrogen bond (2) are observed. View Full-Text
Keywords: synthesis; crystal structure; 6,10-dioxaspiro[4.5]decane-7,9-dione synthesis; crystal structure; 6,10-dioxaspiro[4.5]decane-7,9-dione

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Jiang, J.; Zeng, W. Synthesis and Crystal Structures of Two New Oxaspirocyclic Compounds. Crystals 2016, 6, 134.

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