Tris(trimethylsilyl)aluminum

[65343-66-0] C9H27AlSi3 (MW 246.61) InChI = 1S/3C3H9Si.Al/c3*1-4(2)3;/h3*1-3H3; InChIKey = PMTNABPGINFFGB-UHFFFAOYSA-N (·OEt2) [75441-10-0] C13H37AlOSi3 (MW 320.75) InChI = 1S/C4H10O.3C3H9Si.Al/c1-3-5-4-2;3*1-4(2)3;/h3-4H2,1-2H3;3*1-3H3; InChIKey = DAICGAZEJMWRAW-UHFFFAOYSA-N (nucleophilic silylation;2, 3 silylalumination of terminal alkynes;4 preparation of allyl-, aryl-, and alkenylsilanes5, 6) Physical Data: mp 60 °C (dec). Solubility: sol ethers, pentane, benzene; reacts violently with protic solvents. Form Supplied in: white needles; not commercially available. Preparative Methods: to Aluminum powder and granular aluminum in ether is added Mercury(0) and Chlorotrimethylsilane followed by Lithium wire. After the reaction is complete, the solution is filtered and ether is removed. The solid residue is stirred with pentane, which effects removal of insoluble Li(Me3Si)4Al. Partial concentration and cooling of the pentane solution gives (Me3Si)3AlċOEt2 as white needles.1b,2c Handling, Storage, and Precautions: ignites spontaneously in air. The reagent can be conveniently handled as a stock solution in pentane, which can be stored under an inert atmosphere in a freezer. The molarity can be determined by titration.2c,6