Fluorosilanes hydrolysis

This common way of synthesis has to cope with the problem that the reaction is nearly uncontrollable because of polycondensation [1], Intermediates, e.g., chlorosilanols, cannot be proved or isolated. However, starting with the alkaline hydrolysis of fluorosilanes, halosilanols, silandiols, and aminosilanols can be prepared and stabilized by bulky groups. 

Cyclodisilazane anions and cyclodisilazanes in cw-conformation are found in the reaction of dilithiated bis(silylamino)fluorosilanes with chlorotrimethylsilane. The dilithium salt of the corresponding bis(silylamino)chlorosilane is obtained. LiCl elimination in the presence of THF leads to the formation of silaamidides (which are isolated as dimers),19,26 four-membered cyclodisilazane anions and (thf)3Li-Cl-Li(thf)36 or Li(thf)/ cations (Scheme 10).19,27 Hydrolysis of dimeric silaamidides is a facile synthesis leading to cyclodisilazanes in the cw-conformation. Examples are shown in Figs. 1 and 2 (Scheme 11).19,27... 

---