Acta Cryst. (2001). E57, o1029-o1031  [ doi:10.1107/S160053680101683X ]

r-1,c-2,t-3,t-4-1,3-Bis(4-methoxyphenyl)-2,4-bis(5-phenyl-1,3,4-oxadiazol-2-yl)cyclobutane 1,4-dioxane solvate

Y. Zheng, J.-P. Zhuang, W.-Q. Zhang, X.-B. Leng and L.-H. Weng

Abstract: The asymmetric unit of the crystal structure of C₃₄H₂₈N₄O₄.C₄H₈O₂, which is a 1:1 inclusion complex, consists of half a molecule of the title compound t-DPC and half a molecule of 1,4-dioxane. The structure shows that t-DPC is centrosymmetric; its cyclobutane ring has an exactly planar conformation, and is nearly square. The four C-C single bonds are of equal length [1.569 (4) Å] and the bond angles are 91.6 (2) and 88.4 (2)°. The major photodimerization process is a head-to-tail reaction rather than a head-to-head one.

Online 13 October 2001

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