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Synthesis of pentacoordinate silicon complexes from SiO2


THE potential role of inorganic and organometallic silicon compounds in the development of new chemical reagents, polymers, glasses and ceramics1 is limited at present by the paucity of simple silicon-containing starting materials. Whereas industrial carbon-based chemistry can draw on the diversity of compounds produced from crude oil, coal or other natural sources, silicon chemistry2 relies almost exclusively on the carbothermal reduction of SiO2 to silicon. This is then transformed into feedstock chemicals by reaction with HCl, or by routes such as the 'direct process' for making methylchlorosilanes2, in which silicon is reacted with methyl chloride at 200–350°C over a copper/tin catalyst. Organosilicon compounds are in demand in fields ranging from organic synthesis to ceramics to the electronics industry. New synthetic routes to these materials are therefore highly desirable, especially if they rely on low-cost SiO2 and on rocessing methods that avoid the energy-intensive and equipment-intensive carbothermal reduction step which currently precedes almost all silicon chemistry. Here we describe a direct process in which SiO2 is reacted with ethylene glycol and an alkali base to produce highly reactive, pentacoordinate silicates which provide access to a wide variety of new silicon compounds.

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  1. Inorganic and Organometallic Polymers with Special Properties (ed. Laine, R. M.) NATO ASI Series E: Appl. Sci., No. 30 (Kluwer, Dordrecht, 1991).

  2. Kirk-Othemer Encyclopedia of Chemical Technology, 3rd Ed., Vol. 20, 750–880 (Wiley-lnterscience, New York, 1979).

  3. Boudin, A., Cerveau, G., Chuit, C., Corriu, R. J. P. & Reye, C. Angew. Chem. Int. Ed. 25, 473–474 (1986).

    Article  Google Scholar 

  4. Corriu, R. J. P., Perz, R. & Reye, C. Tetrahedron 39, 999 (1983).

    CAS  Article  Google Scholar 

  5. Boudin, A., Cerveau, G., Chuit, C., Corriu, R. J. P. & Reye, C. Organomet. 7, 1165–1171 (1988).

    CAS  Article  Google Scholar 

  6. Rosenheim, A., Raibmann, B. & Schendel, G. Z. anorg Chem. 196, 160 (1931).

    CAS  Article  Google Scholar 

  7. Barnum, D. W. Inorg. Chem. 9, 1942 (1970).

    CAS  Article  Google Scholar 

  8. Barnum, D. W. Inorg. Chem. 11, 1424 (1970).

    Article  Google Scholar 

  9. Kenney, M. E. & Goodwin, G. B. US Patent No. 4,717,773 (January 1988).

  10. Frye, C. L. J. Am. chem. Soc. 92, 1205–1210 (1970).

    CAS  Article  Google Scholar 

  11. Tandura, S. N., Voronkov, M. G. & Alekseev, N. V. Topics Curr. Chem. 131, 99–186 (1986).

    CAS  Article  Google Scholar 

  12. Swamy, K. C. K. et al. J. Am. chem. Soc. 112, 2341–2348 (1990).

    CAS  Article  Google Scholar 

  13. Holmes, R. R. Chem. Rev. 90, 17 (1990).

    ADS  CAS  Article  Google Scholar 

  14. Holmes, R. R., Day, R. O. & Payne, J. S. Phos. Sulf. Silicon 42, 1–13 (1989).

    CAS  Article  Google Scholar 

  15. Laine, R. M., Ray, D. J., Viney, C. & Robinson, T. R. Am. chem. Soc. Polym. Preprints 32, No. 3, 550 (1991).

    Google Scholar 

  16. Fujita, M. & Honda, K. Polymer Commun. 30, 200 (1989).

    CAS  Google Scholar 

  17. Spindler, R. & Shriver, D. F. J. Am. chem. Soc. 110, 3036 (1988).

    CAS  Article  Google Scholar 

  18. Levin, E. M., Robbins, C. R. & McMurdie, H. F. Phase Diagrams for Ceramists, 5th Printing (eds. Reser, M. K.) 87–92 (American Ceramic Society, 1985).

    Google Scholar 

  19. Bickmore, C. R. et al. 5th Int. Conf. infrastructure Processing (eds Hench, L. L., West, J. K. & Ulrich, D. R.) (Wiley, New York, in the press).

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Laine, R., Blohowiak, K., Robinson, T. et al. Synthesis of pentacoordinate silicon complexes from SiO2. Nature 353, 642–644 (1991).

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