Silicon halides complex hydrides

The distinction between between mono- and dinuclear metal complexes is only a formal one in terms of bonding (consider one substituent at silicon the second metal atom instead of an organic group, halide, or hydride substituent). The structural and spectroscopic features related to the three-center bond should therefore be more or less the same as previously discussed. 

Silicon halides react with complex hydrides to form silanes. Complex hydrides used are LiAlH and to a lesser extent MBH (M = Li, Na, K) . Reductions are carried out in aprotic ether solvents, e.g., Et O, glymes, THE or n-BUjO. These reactions are adaptable to Si—D bond synthesis (see 1.6.7.1.2). Typical syntheses of monosilanes are shown in Table 1. Chlorosilanes are preferred the fluorides react less readily. Bromo- and iodosilanes react easily but offer no advantage over the more available chlorides. ... 

All silicon halides are readily reduced by hydride ions or complex hydrides (qv) to silicon hydrides (16—18). 

Silicon, as the heavier homolog of carbon, is fourfold coordinated in its compounds in most cases. This is, for example, reflected by the chemistry of silicates [1]. In these naturally occurring compounds, the silicon atoms are almost exclusively found in Si04-coordination. The situation is similar for synthetic solids, such as extended binary phases like pure silica zeolite-type frameworks [2], SiS2, SiC or Si3N4, and related more complex ternary and multinary solids [3], This is also valid for molecular silicon halides, hydrides, and metal organic (e.g., silicon alkoxides) as well as organometaUic silicon compounds [3, 4],... 

The oxides, hydrides, halides, sulphides, sulphate , carbonates, nitrates, and phosphates are considered with the basic elements the other compounds are taken in connection with the aoidio element. The double or complex salts in connection with a given element include those associated with elements previously discussed. The carbides, silicides, titanides, phosphides, arsenides, etc., are considered in connection with carbon, silicon, titanium, etc. The intermetallic compounds of a given element include those associated with elements previously considered. 

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