GeHCl

GeHCl, also known as Germanium tetrachloride, is an inorganic compound with the chemical formula GeCl4. It is a colorless, fuming liquid at room temperature and pressure. Germanium tetrachloride is highly reactive and readily hydrolyzes in the presence of moisture to form germanium dioxide (GeO2) and hydrochloric acid (HCl). This reaction is often vigorous.

GeHCl can be synthesized through various methods, including the direct reaction of germanium with chlorine gas at elevated temperatures. It is an important intermediate in the production of high-purity germanium metal and germanium dioxide. These materials have applications in semiconductors, optical fibers, and infrared optics due to germanium's unique electronic and optical properties.

The compound is also used as a precursor in the deposition of germanium-containing thin films via chemical vapor deposition (CVD) techniques. In research settings, it may be employed in organometallic chemistry. Due to its corrosive and reactive nature, GeHCl must be handled with appropriate safety precautions in well-ventilated areas, avoiding contact with skin, eyes, and respiratory systems. Its high vapor pressure and tendency to fume indicate its volatility.