Halides intercalation into graphite

At this time, no all-inclusive rule can be given that will predict whether a given compound will intercalate or not. Most of the information available seems to have been obtained empirically. Such analogies as similar chemical properties have been helpful. The many factors that infiuence the intercalation process have been surveyed by Herold (H14). In Tables II-VI are listed metal halides considered to intercalate into graphite, together with some structural information (S2J, i 9). Several general characteristics have been ascribed to intercalat-... 

It is probable that similar complexes are formed when iodine and the iodine halides are intercalated into graphite. In this case, two subspectra are seen (Table 6), suggesting that the I2 molecule is bound through only one atom. The parameters are very similar to those for the cr-complexes discussed below (Table 7). It seems likely that the structure of the Qo—12 complex is similar, although other possibilities have also been considered28. 

Biintercalation, an interleaving of different inserted species, has been studied in the case of inserted halide species " . Halogen-containing solvents, with metal chlorides, can also lead to ternary phases, such as graphite-FeCl3-C2H4Cl2 . A different approach to inserted halides is the intercalation compound with trimethyltin chloride . Finally, the intercalation of halides into carbon fibers is an area of increasing interest . ... 

---