The single crystal structure of seven tri- and tetracyclic ozonides derived from 8-oxabicycle[3.2.1]oct-6-en-3-ones have been characterized by X-ray diffraction method. Five ozonides (4, 5, 6,7 and 8) crystallize in the monoclinic crystal system with P2(1)/c space group. Compound 3 crystallize in the unusual centro-symmetric space group R (3) over barm, which represents similar to 0.04% of the total number of structures know. The supramolecular structure of 3 forms infinite channels in a hexagram fashion, resulting in a honeycomb-like structure. Semi-empirical (PM6) and density functional theory methods (DFT) with the B3LYP functional and the 6-31G(d) basis set were used to optimize the geometries and compute structural parameters (bond lengths, angles and dihedral angles) that could be compared to the refined crystal structure. The theoretical results show good agreements with the experimental structure. (C) 2014 Elsevier B.V. All rights reserved.
Almeida Barbosa, Luiz-Claudio de; Culter, David; Mann, John, Journal of the Chemical Society. Perkin transactions I, 1996, # 11, p. 1101 - 1106
作者:Almeida Barbosa, Luiz-Claudio de、Culter, David、Mann, John、Crabbe, M. James、Kirby, Geoffrey C.、Warhurst, David C.
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Barbosa, Luiz-Claudio de Almeida; Cutler, David; Mann, John, Journal of the Chemical Society. Perkin transactions I, 1992, # 24, p. 3251 - 3252
作者:Barbosa, Luiz-Claudio de Almeida、Cutler, David、Mann, John、Kirby, Geoffrey C.、Warhurst, David C.