作者:Gideon Steyl、Andreas Roodt
DOI:10.1107/s0108270103016548
日期:2003.9.15
The structure of the title compound (systematic name: 3,7-dibromo- 2-hydroxy-6-isopropylcyclohepta-2,4,6-trien-1-one), C10H10Br2O2, previously described by Ito, Fukazawa & Iitaka [ Tetrahedron Lett. (1972), 13, 745-749], has been redetermined. Strong inter-and intramolecular hydrogen bonds, with H...O distances of 2.17 (9) and 2.06 (6) Angstrom, respectively, are observed. There are also two short Br...Br and two short Br...(ring centroid) interactions. Important dimensions include C-O(carbonyl) = 1.252 (5) Angstrom, C-O(hydroxyl) = 1.355 (5) Angstrom, C-Br(3-position) = 1.904 (4) Angstrom and C-Br(7-position) = 1.905 (4) Angstrom, and an O-C-C-O ring torsion angle of. -6.7 ( 6)degrees.