Fitzgerald L J, Gallucci J C, Gerkin R E
Department of Chemistry, Ohio State University, Columbus 43210.
Acta Crystallogr C. 1993 Feb 15;49 ( Pt 2):398-400. doi: 10.1107/s0108270192009375.
Crystalline dibenzofuran-d8 has been found to exhibit disorder of the type described previously for dibenzofuran. The disordered molecules are related to the ordered molecules by a 180 degrees rotation about an axis passing through the molecular center of mass and perpendicular to the furan ring. In the present structure 11(2)% of the molecules were found to adopt this alternate orientation. The molecules are bisected by a mirror plane normal to the furan ring and containing the O atom. The average bond length in the benzenoid ring is 1.392 (10) A. The furan ring and the benzenoid ring are separately planar, but form a dihedral angle of 1.45 (9) degrees with each other.
已发现结晶态的二苯并呋喃 - d8呈现出先前所述的二苯并呋喃类型的无序状态。无序分子与有序分子通过绕着一条穿过分子质心且垂直于呋喃环的轴旋转180度相关。在当前结构中，发现11(2)%的分子采取这种交替取向。分子被一个垂直于呋喃环且包含O原子的镜面平分。苯环中的平均键长为1.392(10) Å。呋喃环和苯环各自呈平面状，但彼此形成1.45(9)度的二面角。
