Homopolyatomic cations reactions

Direct Synthesis reaction of, 6 395 fluoride, 21 235, 237, 239, 249 homopolyatomic cations, 17 82 ion, stereochemistry, 2 40-41, 44-45 isocyanates, preparation, 9 158 properties, 9 157 isothiocyanates, properties, 9 177 mixed valence compounds of, 10 375-381 crystal structure of, 10 376 diffuse reflectance spectrum of, 10 380 structure of Pb," ion, 10 381 nuclear magnetic shielding, 22 224 organometallic compounds, 2 82, 88, 89 oxide, neutron diffraction studies on, 8 231-233... 

As their review [49] shows, Gillespie, Passmore and co-workers have isolated +, IJ, 1+ and many cations of S, Se, Te and Hg as solids in this general way. They used the weaker oxidant AsF5 to produce homopolyatomic cations of Se, Te and Hg in S02, the reduction product AsF3 being weakly basic. On occasions they used liquid AsF3 as the reaction solvent. 

Salts of homopolyatomic cationic clusters now constitute a well-established class of compound— there are at least twenty-six fairly well-characterized examples. It is probable that many other elements will also be shown to form polyatomic cations. As yet reactions of these species have been little studied, and there is obviously a wide open field here awaiting exploration. Many structures of known cations, as well as those that have not yet been prepared, remain to be investigated, and there is a need for theories that can predict the stability and geometry of these cations and provide a description of the bonding. 

Cameron TS, Decken A, Fang M, Ptirsons S, Passmore J, Wood DJ (1999) Oxidation of methyl groups in the reaction of sulfur homopolyatomic cations with acetonitrile formation and crystal structure of the novel trithietanyUum ring. Chem Comm 1801-1802... 

Chalcogen-nitrogen cations can be generated by the reactions of homopolyatomic chalcogen cations with azides. For example, the... 

---