5, 6, 11, 12-Tetrabromo-5, 6, 11, 12-tetrahydrodibenzoa, ecyclooctene, C16H12Br4, crystallizes in monoclinic space group P21/c witha=8.6917(7),b=15.135(2),c=12.892(2) Å, β=101.836(8)°, V=1660.0(7) Å3,Z=4. The structure was refined toR=0.058 for 3137 observed reflections. The molecule has approximate C2symmetry, with the eight-membered ring adopting the twist-boat conformation. The planes of the two phenyl rings form a dihedral angle of 117.3(2)°, C−Br distances range 1.965(5)–1.
展开▼
