Monosodium acetylide is an organosodium compound with the formula . It is a sodium salt of acetylene, consisting of sodium cations and hydrogen acetylide anions . It is a derived from acetylene by deprotonation using a sodium base, typically sodium amide.[1]
This compound, a white solid, has been characterized by neutron diffraction, which revealed an Na-C bond and a bond of 127 pm, which is longer than the bond length in acetylene itself (120.4 pm).[2] As a reagent, monosodium acetylide has been largely displaced by monolithium acetylide, which can be prepared more easily.[3]
Monosodium acetylide hydrolizes in contact with water, producing sodium hydroxide and acetylene.