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On the formation of permethylcyclopolysilanes in the würtz-type reaction of Me2SiCl2: The influence of solvent and complexing agent (1995)

Pawelec, Z. ; Wojnowski, W.

Springer

Journal of inorganic and organometallic polymers and materials 5 (1995), S. 163-168

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ISSN: 1572-8870

Schlagwort(e): Polysilanes ; cyclopolysilanes ; solvated electron ; crown ether

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Abstract Permethylcyclopolysilanes are most often prepared by Würtz-type coupling of Me2SiCl2 with Na K alloy in THI: When nonpolar solvents like benzene were used, only linear polysilanes (Me2Si)n were produced, but the addition of a catalytic amount of crown ether 18-crown-6 was found to increase significantly the amount of cyclic oligomers. The ratio of (Me2Si)6 to (Me2Si)5 decreased from 18:1 to 6:1 in the presence of crown ether in a typical synthesis in THF. An explanation based on solvated electron theory has been proposed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01058144

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