Two-dimensional structure of bromine intercalated graphite

Synchrotron and sealed tube x-ray diffraction studies on the quasi two-dimensional stage-2 graphite-bromine commensurate phase, prepared with single crystals of graphite, are presented. The two-dimensional structure of the intercalate bromine and the carbon plane has been derived from intensity data measured with a four-circle diffractometer. The bromine structure, having nearest neighbor distances of 2.25, 2.38, 2.55 and 2.86 Å in the (001) plane, exhibits a novel long-chain polymeric form. The distances are comparable to the interatomic bond lengths in the existing polymeric bromides.