Silicon halides phosphines

Alkyl and Aryl Derivatives.—The cleavage of silicon-nitrogen bonds in A-silylphosphazenes by reactions with phosphorus and silicon halides has been studied in some detail. For example, with phosphorus trichloride a novel tri(phosphazenyl)phosphine is obtained ... 

A variety of substituted silyl phosphines, all based on Si-P linkages, can be made by reacting alkali metal phosphides with silicon halides as in (9.176) through (9.178). 

A. Nucleophilic Reactions of the P=0 Group.—Tris(trifluoromethyl)-phosphine oxide (33) reacts with hexamethyldisiloxane to give a phos-phorane, whose n.m.r. spectrum at — 140 °C shows non-equivalent trifluoromethyl groups. Although this unusual reaction clearly involves nucleophilic attack of the phosphoryl oxygen on silicon at some stage of the reaction, a full study of the mechanism has not been published. Tertiary phosphine oxides can be converted cleanly into dichlorophos-phoranes (34) by treatment with two moles of phosphorus pentachloride. Alkylation of the sodium salt of tetraphenylmethylenediphosphine dioxide (35) with alkyl halides, in dimethyl sulphoxide, has been reported to... 

To prepare FPS containing surface groups such as amine, substituted phosphine, thiol, or halide, bonded to silicon by alkyl or similar chains, two-component systems are usually used (see Scheme 1) ... 

Recently, Lukashev and Kazankova reported reactions of phosphorylated alkoxyacetylenes with phosphine halides (equation 51) and halides of silicon or germanium (equation 52). Usually the final products in these reactions are ketenes (79, 81), however, an intermediate formation of vinyl ethers 80 has been detected in reaction 52. 

Nonflammable gas. Chlorine pentafluoride is a highly reactive substance. It reacts explosively with water. Paper, cloth, wood, and other organic matter would burst into flames upon contact with the liquid or vapor of chlorine pentafluoride. Vigorous to violent reaction occurs with metals. Reactions with oxides, sulfides, halides, and carbides of metals are violent. It forms explosive mixtures with hydrogen, carbon monoxide, hydrocarbon gases, ammonia, phosphine, sulfur dioxide, and hydrogen sulfide. It reacts violently with sulfur, phosphorus, silicon compounds, charcoal, and mineral acids. 

If the cyclic trimer (9.316) is heated, pentameric phenylphosphine is obtained (9.326). Like their silicon and germanium analogues, stannyl phosphines are easily hydrolysed (9.327), or oxidised to phosphinates (9.328). The P-Sn bond is broken by alkyl halides as in Equation 9.329. 

Ion implantation [15] forces ions of dopant into the silicon using a stream of high energy ions produced in a machine similar to a mass spectrophotometer. Sources of dopants for this process are elemental arsenic and phosphorus, arsine, phosphine, diborane, and some boron halides. A more detailed description of doping procedures is beyond the scope of this text and can be found elsewhere [8]. 

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