Silicon compounds chemistry

Substituted aroyl- and heteroaroyltrimethylsilanes (acylsilanes) are prepared by the coupling of an aroyl chloride with (Me3Si)2 without decarbonylation, and this chemistry is treated in Section 1.2[629], Under certain conditions, aroyl chlorides react with disilanes after decarbonylation. Thus the reaction of aroyl chlorides with disilane via decarbonylation is a good preparative method for aromatic silicon compounds. As an interesting application, trimel-litic anhydride chloride (764) reacts with dichlorotetramethyidisilane to afford 4-chlorodimethylsilylphthalic anhydride (765), which is converted into 766 and used for polymerization[630]. When the reaction is carried out in a non-polar solvent, biphthalic anhydride (767) is formed[631]. Benzylchlorodimethylsilane (768) is obtained by the coupling of benzyl chloride with dichlorotetramethyl-disilane[632,633]. 

In comparison to the Si—OR bond, the Si—C bond can be considered essentially unreactive if the organic moiety is a simple unsubstituted hydrocarbon. If the organic moiety is substituted as in the case of a trialkoxysilane, the chemistry is more appropriately considered elsewhere (see Silicon COMPOUNDS, SILANES SILICON COMPOUNDS, SILYLATING AGENTS). 

Before discussing the chemistry and technology of silicone polymers it is necessary to consider the methods of nomenclature of the silicon compounds relevant to this chapter. The terminology used will be that adopted by the International Union of Pure and Applied Chemistry. 

S. and Rappoport, Z. (Eds.), The Chemistry of Organic Silicon Compounds, Part 2. Wiley, Chichester, 1989, Chapl. 21. 

Tilley TD (1989) in The chemistry of organic silicon compounds (Patai S, Rappoport Z, eds), Wiley... 

The Chemistry of Organic Silicon Compounds The Chemistry of Enones... 

This oxidant reacts with many compounds. In organic chemistry it is an agent which entirely oxidises substances enabling one to measure them. In microbombs , the contact causes a small explosion. Thus silicon compounds are converted into silica, which can then be measured by gravimetry. When opening the bomb , overpressures can cause comosive substances (especially peroxide in excess) to be thrown up and cause harm. 

I. OjiMA in The Chemistry of Organic Silicon Compound . S. Patai, Z. Rappoport, (eds.) Wiley-Intersdence Chichester, 1989 Chapter 25. 

Considerable literature is currently available about these species. The review by Raabe and Michl in 1985 on Multiple Bonding to Silicon 6 is certainly the most detailed and complete reference to the topic to that date. Subsequently a number of other reviews that provide additional details of more limited areas of the field have been written by Brook and Baines,7 Cowley and Norman,8 Gordon,9 Shklover et al.,w Grev,11 and Lickiss.12 In addition, much information is to be found in The Chemistry of Organic Silicon Compounds edited by Patai and Rappoport,13 especially in chapters 2, 3, 8, 15, and 17. 

Compounds of multiple bond systems involving heavier main group elements were long considered to be unstable and synthetically inaccessible. In particular, the so-called double bond rule, which forbade the formation of (pn-pn) multiple bonds between silicon and other elements, hindered the development of the chemistry of low-coordinate silicon compounds containing Si=X (X = C, N, Si, P) double bonds for some years. 

The synthesis of iminosilanes has opened up a new field of silicon-nitrogen chemistry. These compounds have an interesting chemistry. As shown, many addition and cycloaddition reactions are possible. Many new and surprising results are likely in the future. 

---