What is "disilyne"

n. 1 (context chemistry English) a molecule containing a silicon atom which forms a triple bond to another silicon atom 2 (context inorganic chemistry English) a silicon analog of alkynes containing at least one silicon-silicon triple bond. 3 (context inorganic compound English) a silicon analog of ethyne, Si₂H₂ ( SiH≡SiH )

Disilyne, , is a metalloid hydride composed of silicon and hydrogen. Disilyne is not well-characterised or well-known, and it is kinetically unstable with respect to isomerisation. The most stable isomer is a dibridged singlet, named di-μH-disilyne, followed by a monobridged μH-disilyne. A third, unbridged singlet ismomer is predicted to exist before disilyne - disilenylidene.

Disilynes contain a formal silicon–silicon triple bond and as such is formulated RSi (where R is a substituent group) and is the silicon analogue of an alkyne. Some chemists use the term silyne to refer to compounds containing a silicon–silicon triple bond whilst others use the term to refer to compounds containing a silicon–carbon triple bond by analogy to silene, which often refers to compounds containing silicon–carbon double bonds. The term polysilyne can refer to the layer polymer (SiH) or substituted derivatives.