Si2H2

Disilane, with the chemical formula Si2H2, is a chemical compound consisting of two silicon atoms and two hydrogen atoms. It is a silicon hydride, also known as a silane. Disilane is a colorless gas at room temperature and pressure. Its structure consists of a silicon-silicon single bond with one hydrogen atom attached to each silicon atom. This is analogous to ethane (C2H2), though the bonding and properties differ significantly due to the nature of silicon.

Disilane is an unstable compound. It is prone to decomposition, particularly when exposed to heat or light. It can react vigorously with oxygen. Due to its instability and reactivity, disilane is not commonly encountered in everyday applications and is primarily of interest in scientific research, particularly in the study of silicon chemistry and materials science. It can be synthesized through various chemical routes, often involving reactions with silicon halides. Its role in industrial processes is limited, although related silanes are used in semiconductor manufacturing.