In a manner similar to that outlined on page 1022, (a) Write equations to represent the reaction
Question:
In a manner similar to that outlined on page 1022,
(a) Write equations to represent the reaction of (CH3)3SiCl with water, followed by the elimination of H2O from the resulting silanol molecules.
(b) Does a silicone polymer form from part (a)?
(c) What would be the corresponding product obtained from CH3SiCl3?
Transcribed Image Text:
Silanes and Silicones Several silicon-hydrogen compounds are known, but because Si Si single bonds are not particularly strong, the chain length in these compounds, called silanes, is limited to six. H H-Si-H H Monosilane HH T T H-Si-Si-H HH Disilane HHH | T H-Si-Si-Si-H S6H14 CH3 CH3 HO-Si-O-H + HO-Si-OH I CH3 CH3 HHH Trisilane Other atoms or groups of atoms can be substituted for H atoms in silanes to produce compounds called organosilanes. Typical is the direct reaction of Si and methyl chloride, CH3Cl. The equation for the reaction is given below: 2 CH3Cl + Si (CH3)2SiCl2 The reaction of (CH3)2SiCl2, dichlorodimethylsilane, with water produces an interesting compound, dimethylsilanol, (CH3)2Si (OH)2. Dimethylsilanol under- goes a polymerization reaction in which H₂O molecules are eliminated from among large numbers of silanol molecules. The result of this polymerization is a material consisting of molecules with long silicon-oxygen chains: silicones. Hexasilane -H₂O CH3 CH3 CH3 →HO-Si-O-Si-o-Si-OH CH3 CH3 CH3 A silicone n
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Related Book For
General Chemistry Principles And Modern Applications
ISBN: 9780132931281
11th Edition
Authors: Ralph Petrucci, Jeffry Madura, F. Herring, Carey Bissonnette
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