Tris(trimethylsilyl)methane is the organosilicon compound with the formula (tms)<sub>3</sub>CH (where tms = (CH<sub>3</sub>)<sub>3</sub>Si). It is a colorless liquid that is highly soluble in hydrocarbon solvents.
Reaction of tris(trimethylsilyl)methane with methyl lithium gives tris(trimethylsilyl)methyllithium, called trisyllithium:
Trisyllithium is useful in Petersen olefination reactions:
Trisyllithium is also a source of the bulky trisyl ligand. Some tris(trimethylsilyl)methyl derivatives are far more stable than less substituted derivatives. For example, is a well-behaved tellurol. is a rare example of a robust organothallium(I) compound.