1. Donor-Stabilized Silyl Cations. 3. Ionic Dissociation of Hexacoordinate Silicon Complexes to Pentacoordinate Siliconium Salts Driven by Ion Solvation1
2. For reviews on crystal structures of organosilicon compounds see: (a) Kaftory, M.; Kapon, M.; Botoshansky, M. InThe Chemistry of Organic SiliconCompounds; Apeloig, Y., Rappoport, Z., Eds.; Wiley: Chichester, U.K., 1998; Vol. 2, p 181. (b) Lukevics, E.; Pudova, O. A.Khim.Geterotsiklicheskikh Soedin.1966, 1605;Chem. Abstr.1997,126, 157528w.
3. For recent reviews on hypervalent silicon complexes see: (a) Brook, M. A.Silicon in Organometallic and Polymer Chemistry; Wiley: New York, 2000; p 97. (b) Chuit, C.; Corriu, R. J. P.; Reyé, C. InTheChemistry of HypervalentCompounds; Kin-ya Akiba, Ed.; Wiley-VCH: Weinheim, Germany, 1999; p 81. (c) Kost, D.; Kalikhman, I. InThe Chemistry of Organic SiliconCompounds; Apeloig, Y., Rappoport, Z., Eds.; Wiely, Chichester, U.K., 1998; Vol. 2, p 1339. (d) Chuit, C.; Corriu, R. J. P.; Reyé, C.; Young, J. C.Chem.Rev.1993,93, 1371.
4. Catecholate Complexes of Silicon: Synthesis and Molecular and Crystal Structures of [Si(cat)2].cntdot.2THF and Li2[Si(cat)3].cntdot.3.5dme (cat = Catecholate Dianion)
5. Equilibrium between neutral hexacoordinate silicon complexes and ionic pentacoordinate siliconium salts through fast dissociation–recombination of the Si–Cl bond