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Carbosilanes - Syntheses and Reactions (Paperback, Softcover reprint of the original 1st ed. 1986)
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Carbosilanes - Syntheses and Reactions (Paperback, Softcover reprint of the original 1st ed. 1986)
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Carbosilanes are compounds in which the elements silicon and carbon
alternate in the molecular skeleton [1]. Just as the alkanes are
formally derived from the diamond lattice and the aromatics from
the graphite lattice, the carbosilanes are structurally derived
from silicon carbide. Because of the tetravalent nature of silicon
and carbon we can expect stable linear, cyclic and polycyclic
compounds to occur. However, carbosilanes do not exist in nature.
This book is an attempt to give a summarized presentation.
Carbosilanes are, of course, part" of organosilicon chemistry, but
their behavior differentiates them distinctly from other
organosilicon compounds. The differences result primarily from the
alternating Si-C-Si arrangements in the molecular skeleton, and
especially the various methylene bridges (CH , CHX, CX ; X =
halogen) cause changes in z z Si-C bond polarization and hence
influence the reaction possibilities. It is convenient to regard
carbosilanes as similar to silicones except that the oxygen bridges
of silicones are replaced by methylene units. However, this does
not accurately account for all the chemical properties of these
compounds. Carbosilanes are related more directly to silicon
carbide, as shown occasionally by the reactive behavior of
polycyclic car bosilanes. Therefore, in view of the present
interest shown for thermally stable cera mics of unusual character,
interesting possibilities arise for further development. Most
cyclic carbosilanes can be classified in two groups: the
carborundanes and the Si-scaphanes. Compounds belonging to the
carborundane class maintain Si-C six-membered rings in the boat
conformation.
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