Preparation of alkoxy aroxy silanes

Tetraalkoxy(aroxy)silanes, or ethers of orthosilicon acid H4Si04.have the most practical applications among all the silicone compounds without Si— C bonds in their molecule. 

The first ether of orthosilicon acid, tetraethoxysilane, was obtained by Ebelmen in 1844 by reacting silicon tetrachloride with ethyl alcohol. 

Tetraethoxysilane can be obtained not only from SiCl4, but also from SiBr4 and SiF4. Silicon tetraiodide Sil4 is not advisable, since in this case 

Sil4 can yield tetraethoxysilane only by this reaction  

Further on, a range of other methods to prepare tetraalkoxy(aroxy)silanes have been suggested  

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