Preparation and Characterization of Novel Boron Nitride Intercalation Compounds and Ag (III) Fluorocomplexes

摘要

This research exploits the extraordinarily stable anions, SO3 F(sup -1) and MF6 (sup -1) (M = As, Sb) to stabilize cationic entities, such as (BN)x(sup +), O2(sup 1+), and AgF2(sub 1+)in the preparation of novel materials. The metal pentafluoride in combination with fluorine is a powerfully oxidizing system producing AsF6(sup -1) and SbF6 (sup -1) or the polymeric anion Sbn/F 5n+1/(sup -1) which stabilize the cationic species. When hexagonal boron nitride is exposed to S2 O6 F2 it rapidly forms a deep blue intercalation compound of the composition (BN)3 SO3 F. Further treatment of (BN)3 SO3F with AsF5 alone or AsF 5 /F2 has resulted in the formation of new intercalation compounds formulated as (BN)/sub >9/AsF5 SO3 F and (BN)4.8/AsF6 , respectively. A mixture of SbF5 /F2 will spontaneously oxidize boron nitride producing a boron nitride fluoroantimonate compound, (BN)x/(SbF5 )/n/F. Attempts to intercalate BN with some very powerfully oxidizing noble metal hexafluorides, MF6 (M = Os, Ir, Pt), have resulted in the oxidation of BN to BF3 and N2 with the corresponding reduction of MF6 to lower metal fluorides or the metal. These materials appear to be neither thermodynamically nor kinetically stable. Evidence is given for the reversible dissolution of dioxygenyl salts in thoroughly dried HF. Also, evidence is presented for the existence of the silver (III) fluoro-cation, AgF2(sup +1) 98 refs., 9 figs., 10 tabs. (ERA citation 14:015531)