1,3,5,7-Tetramethyl-1,3,5,7-tetrasilaadamantane is the

organosilicon compound Organosilicon chemistry is the study of organometallic compounds containing carbon–silicon bonds, to which they are called organosilicon compounds. Most organosilicon compounds are similar to the ordinary organic compounds, being colourless, f ...

with the formula . It is a colorless solid that is soluble in organic solvents. The compound is one of the iconic

carbosilanes Carbosilanes are organosilicon compounds where the structures feature alternating silicon and carbon atoms, i.e., linkages. They represent molecular analogues of silicon carbide. The compounds exploit the tendency of both carbon and silicon to fo ...

, featuring alternating linkages. Otherwise it can be described as a

diamondoid In chemistry, diamondoids are generalizations of the carbon cage molecule known as adamantane (C10H16), the smallest unit cage structure of the diamond crystal lattice. Diamondoids also known as nanodiamonds or condensed adamantanes may include one ...

cluster. It arises as one of many products from the pyrolysis of

tetramethylsilane Tetramethylsilane (abbreviated as TMS) is the organosilicon compound with the formula Si(CH3)4. It is the simplest tetraorganosilane. Like all silanes, the TMS framework is tetrahedral. TMS is a building block in organometallic chemistry but als ...

. A more efficient route involves the reaction of the cyclic carbosilane (1,1,3,3,5,5-hexamethyl-1,3,5-trisilacyclohexane) with

aluminium tribromide Aluminium bromide is any chemical compound with the empirical formula AlBrx. Aluminium tribromide is the most common form of aluminium bromide. It is a colorless, sublimable hygroscopic solid; hence old samples tend to be hydrated, mostly as al ...

.{{cite journal , doi=10.1021/ja00724a069, title=1,3,5,7-Tetrasilaadamantanes. Facile synthesis via catalyzed ligand redistribution , year=1970 , last1=Frye , first1=Cecil L. , last2=Klosowski , first2=Jerome M. , last3=Weyenberg , first3=Donald R. , journal=Journal of the American Chemical Society , volume=92 , issue=21 , pages=6379–6380 Heptasila diadamantane

References

Adamantane-like molecules Carbosilanes