N. Alcock, E. Hough
Jun 15, 1972
Citations
1
Influential Citations
7
Citations
Journal
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry
Abstract
The crystal structure of 3,3'-methylene(bis-6-bromo-4-hydroxycoumarin), C19Hx006Br2, has been determined by single-crystal X-ray diffraction by the heavy atom method with 922 reflexions refined to an R value of 0-054. The molecular structure confirms that previously found for dicoumarol itself. The crystal investigated was tetragonal, space group P4~212 with a=5"496, c=54"49 A,, Z=4 , De= 2.012 g.cm-3. The unusual unit cell is attributed to packing of the molecules in layers, the 41 axis arising as a result of a good fit between the layers after a rotation of 90 °.