The synthesis of tris(pentachlorophenyl)silane (1), perchlorotriphenylsilane (2), and bromotris(pentachlorophenyl)silane (3) are reported for the first time, the hydrolysis of (2) and (3) under neutral conditions giving tris(pentachlorophenyl)silanol (4); the structure of the silane (2) has been established by X-ray crystallography.