Articulo de referencia

Sodium silox

Sodium silox is the name for an organosilicon compound that serves as a source of the siloxide anion [(CH 3 ) 3 C] 3 SiO − . Complexes of this bulky anionic ligand often adopt w...

Sodium silox is the name for an organosilicon compound that serves as a source of the siloxide anion [(CH3)3C]3SiO. Complexes of this bulky anionic ligand often adopt with low coordination numbers. Examples include Ti(silox)3, Nb(silox)3(PMe3), and [Cr(silox)3].

The sodium derivative, which has salt-like properties, is a cubane-type cluster.[1]

Related bulky anionic ligands include C5Me5, (Me3Si)2N, and NacNac. Silox has a larger cone angle than C5Me5 and is a poorer donor. It is also larger than silylamides. For these reasons, silox anion forms highly unsaturated complexes.

Complexes with high coordinative unsaturation display high reactivity so long as they do not undergo intramolecular reactions. Silox offers this possibility. Examples of high reactivity exhibited by metal-silox compounds include the C-O bond in carbon monoxide and the C-N bond in pyridine.[2]

Preparation

El Na(silox) se prepara habitualmente por desprotonación del silanol (t-Bu) 3 SiOH, que se prepara mediante una ruta de varios pasos a través del intermedio (t-Bu) 2 SiF 2 . [ 3 ] También se obtiene por tratamiento de t Bu 3 SiNa con óxido nitroso .

Referencias

  1. Lerner, Hans-Wolfram; Scholz, Stefan; Bolte, Michael "Los silóxidos de sodio (tBu 3 SiONa) 4 y (tBu 2 PhSiONa) 4 : Síntesis y análisis de la estructura cristalina por rayos X" Organometallics 2002, 21, 3827-3830. doi : 10.1021/om020318v
  2. Peter T. Wolczanski "Química de centros metálicos electrófiloscoordinados por silox ( tBu3SiO ), tritox ( tBu3CO ) y ligandos bifuncionales relacionados" Polyhedron, 1995, 14, 3335-3362.doi : 10.1016 / 0277-5387 (95)85014-7 .
  3. Edward M. Dexheimer y Leonard Spialter, Lee D. Smithson "Tri-t-butilsilano: síntesis, propiedades físicas, derivados y reactividad frente a la ozonólisis, cloración, fluoración e hidrólisis" Journal of Organometallic Chemistry 102, 1975, 21-27. doi : 10.1016/S0022-328X(00)90256-0 .
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