1. For some reviews and books of the chemistry of hypervalent componds, see: (a) Hayes RA, Martin JC (1985) Sulfurane chemistry. In: Bernardi F, Csizmadia IG, Mangini A (eds) Organic sulfur chemistry; theoretical and experimental advances. Elsevier, Amsterdam, p 408
2. Bergman J, Engman L, Sieden J (1986) In: Patai S (ed) The chemistry of organic selenium and tellurium compounds. Wiley, Chichester, chap 14
3. Rauchfuss TB (1987) Acidity, hydrogen bonding and self-association in organic and organometallic compounds of selenium and tellurium. In: Patai S (ed) The chemistry of organic selenium and tellurium compounds, vol 2. Wiley, Chichester, chap 6, p 339
4. Oae S (1988) Ligand coupling reactions within hypervalent species. In: Oae S (ed) Reviews on heteroatom chemistry, vol 1. MYU, Tokyo, p 304
5. Oae S (1991) Ligand coupling reactions within hypervalent species I. On sulfur and related atoms of group VI elements. In: Oae S (ed) Reviews on heteroatom chemistry, vol 4. MYU, Tokyo, p 195