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Thermal Reaction of Silane with Acetylene and The Thermal Decomposition of Ethynylsilane

Published online by Cambridge University Press:  15 February 2011

M. A. Ring ,
H. E. O'Neal ,
J. W. Erwin  and
D. S. Rogers
M. A. Ring
Affiliation:
Department of Chemistry, San Diego State University, San Diego, CA 92182
H. E. O'Neal
Affiliation:
Department of Chemistry, San Diego State University, San Diego, CA 92182
J. W. Erwin
Affiliation:
Department of Chemistry, San Diego State University, San Diego, CA 92182
D. S. Rogers
Affiliation:
Department of Chemistry, San Diego State University, San Diego, CA 92182
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Extract

The volatile products from the thermal reaction (414°C) of silane in excess acetylene are hydrogen, ethylene, vinylsilane, ethynylsilane, vinylethynylsilane (possibly divinylsilane) and ethynyl-divinylsilane (1,2). We have reexamined this reaction using a 3 C2 H2/1 SiH4 reaction mixture and have obtained product yield curves for these products versus percent silane loss. We have also found that product curves are unaffected when propylene at pressures equal to that of acetylene is also present. Since only trace quantities of propylsilane are produced in the presence of propylene, we can rule out reactions involving silyl radicals. Thus the SiH4−C2H2 reaction involves silylene and silene intermediates. The products can be explained by a mechanism similar to one proposed by Barton and Burns (3).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 32: Symposium B – Better Ceramics Through Chemistry I , 1984 , 383
Copyright
Copyright © Materials Research Society 1984

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References

REFERENCES

(1) White, D. G. and Rochow, E. G., J. Am. Chem. Soc., 76, 3897 (1954).CrossRefGoogle Scholar
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(3) Barton, T. J. and Burns, G. T., Tetrahedron Lett., 24, 159 (1983).Google Scholar
(4) Ring, M. A., O'Neal, H. E., Rickborn, S. F. and Sawrey, B. A., Organometallics, 2, 1891 (1983).Google Scholar
(5) Benson, W. W., “Thermochemical Kinetics,” John Wiley and Sons, New York (1976).Google Scholar